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Institut Mittag-Leffler 2014
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Photo front: Apollonian Circle Packings (Maria Weiss)
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Content
Activity Report ....................................................... 2
Contributors........................................................... 4
Research Programs .............................................. 5
Graphs, Hypergraphs, and Computing, spring - Scientific report 5
Organizing committee ........................................... 6
Participants spring ................................................. 7
Seminars ............................................................... 9
Preprints .............................................................. 12
Homogenization and Random Phenomenon, fall - Scientific report 14
Organizing committee ..................................... 15
Participants fall .................................................... 16
Seminars ............................................................. 18
Preprints .............................................................. 20
Participants from and in the Nordic Countries...... 21
Random Matrices and Jacobi operators, May - Scientific report 22
Organizing committee ..................................... 22
Participants ......................................................... 22
Modern aspects of the Titchmarsh-Weyl m-function and its multidimensional
analogues, May - Scientific report ............... 23
Organizing committee ..................................... 24
Participants ......................................................... 24
Kleindagarna 2014, June - Scientific report25
Organizing committee ..................................... 25
Participants ......................................................... 26
Mathematical and Numerical Modeling in Finance, June - Scientific report 26
Organizing committee ..................................... 27
Participants ......................................................... 27
Apollonian Circle Packings, July - Scientific report 28
Organizing committee ..................................... 29
Participants ......................................................... 29
Effective equations in Mathematical Physics, July - Scientific report 30
Organizing committee ..................................... 30
Participants ......................................................... 31
Participants from and in the Nordic Countries...... 32
Publications ......................................................... 33
Acta Mathematica................................................ 33
Library and historical archive ............................... 34
The board of Institut Mittag-Leffler ....................... 35
Administration ..................................................... 35
Bilaga Förvalningsberättelse……………………….36
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Activity Report
Institut Mittag-Leffler is an international research institute for mathematics with a Nordic basis. It was
founded in 1916 by Professor Gösta Mittag-Leffler and his wife Signe, who donated their magnificent
villa with its first-class library for the purpose of creating the Institute that bears their name.
The Institute is today an active international center for front-line research in the mathematical
sciences, operating under the auspices of the Royal Swedish Academy of Sciences. It enjoys the
economic support of national funding agencies from all the Nordic countries, as well as of some private
foundations.
The main activities at the Institute are the research programs, workshops, summer schools, Klein days
for high school teachers and the publication of two research journals Acta Mathematica and Arxiv för
Matematik.
The Institute conducts semester-long programs aimed at research in some area in pure or applied
mathematics of current interest. Each research program is led by an organizing committee. Based on
the recommendations of this committee the Institute invites senior and junior mathematicians to
come and work together at the Institute. The senior participants are chosen among the internationally
leading mathematicians in the given area. To the junior participants, typically recent Ph.D. students,
we offer fellowships, open to everyone to apply for. Mathematicians from the Nordic countries are
given a slight priority. We make, however, sure that scientific caliber and a good mixture of talents and
backgrounds have top priority, to optimize the creative environment at the Institute.
Detailed reports and documentation on the 2014 programs can be found later in this report. See also
our web pages at www.mittag-leffler.se.
An aspect of the programs that is emphasized is to provide good postdoctoral training to the junior
participants. Special seminars and mini-courses are given specifically for them.
During summer 2013 the Institute organized six conferences and a summer school. The summer
school was a female school organized jointly with the Committee Women in Mathematics of the
European Mathematical Society (EMS). The conferences were extremely successful attracting best
experts in the respective fields. The female summer school was really excellent. It was been agreed
with the EMS that we continue organizing such activities every second year.
In addition to area-specific research programs, conferences and summer schools, the Institute has the
RIP program (Research in Peace), which provides a stimulating environment for research in
Mathematics either by individuals or small groups of scientists. For such a program we allocated 2014
two weeks during summer time.
Together with the National Centre for Mathematics Education (NCM) the Institute organizes “Kleindagarna” – training workshop for high school teachers in mathematics. This was already the fourth
year meeting. Financial support from Brummer & Partners was highly appreciated.
All together the Institute hosted 345 participants during the year 2014.
The Institute publishes two journals, Acta Mathematica (founded by Gösta Mittag-Leffler in 1882)
and Arkiv för matematik (founded in 1903). Information about the journals is given later in this
report, as well as on our web pages www.mittag-leffler.se/publications. Acta Mathematica is generally
considered to be one of the leading international mathematics research journals.
Institut Mittag-Leffler is an active participant in international scientific life. It participates in
international networks of mathematics research institutes. For instance, we belong to ERCOM
(European Research Centers on Mathematics), a network of European sister institutes. We also belong
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
to EPDI (European Post-Doctoral Institute), a collaboration between 9 institutes for jointly awarding
postdoctoral fellowships to Europe's most promising young mathematicians.
In order to consolidate Institute’s links with the community of Nordic mathematicians, the Institute in
2012 initiated a meeting of Head of the major mathematic departments of the Nordic countries. This
meeting led to a fruitful exchange of experiences and views. For the Institute such a meeting provides
direct links with our colleagues allowing to us deliver important information about our activities
providing a feedback of needs that are important for mathematics in the Nordic countries. At the
meeting in 2014, besides the heads of mathematic departments, we also had representatives from
Nordic Research Councils. This led to some interesting ideas how we all promote Mathematics in
Nordic countries.
During the autumn 2014 the Institute renovated three remaining flats that were originally built in
1968. The quality of our guest accommodation was improved substantially. We were able to do it due
to generous support from the Wallenberg foundation.
The staff of the Institute does a wonderful job. Visitors from abroad often express their admiration
how such a many-facetted operation can be run, and run so well, by so few individuals.
Among our special guests this year were Sylvia Serfaty (Pierre-and-Marie-Curie University), Juerg
Fröhlich (Zurich), Elliott Lieb (Princeton) and William Fulton (Michigan)
Institut Mittag-Leffler extends its warm gratitude to all organizations and individuals who via grants
and contributions of various kinds have made the work of the Institute possible during the year 2014.
Ari Laptev, Director
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Contributors
The Institute's activities are financed by income from the Mittag-Leffler Mathematical foundation, and
by grants from research councils and foundations. The Institute is very grateful to the following
organizations and individuals for contributions and support during 2014:
The Swedish Research Council, VR
Academy of Finland
Danish Agency for Science, Technology and Innovation
The Icelandic Centre for Research
The Research Council of Norway
Acta Mathematicas fond
Axa Research Fund
Brummer & Partner
Centre for Mathematical Sciences, Lund University
Department of Mathematics, Linköping University
Department of Enginerring Sciences and Mathematics, Luleå University of Technology
Department of Mathematics, Stockholm University
Department of Mathematics and Mathematical Statistics, Umeå University
Department of Mathematics, Uppsala University
Fonden ”Till bröderna Jacob och Marcus Wallenbergs minne”
Knut och Alice Wallenbergs Stiftelse
KTH Royal Institute of Technology
Stiftelsen G.S. Magnusons fond
The Anna-Greta and Holger Crafoord Fund
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Research Programs
Graphs, Hypergraphs, and Computing, spring - Scientific report
The programme during the spring semester 2014 at Institut Mittag-Leffler was titled Graphs,
Hypergraphs, and Computing and as the title indicates one of the ideas behind the creation of the
programme was to encourage an exchange of methods, problems and ideas between these three areas.
In particular structural graph theory, graph colouring, extremal graph theory and algorithms for graph
theoretical problems and the generalisation of these to hypergraphs were emphasised. A general
theory for hypergraphs has existed in some form since at least the 1940's but unlike the very active
research in graph theory it developed very slowly until about ten years ago. In the last ten years this
has changed and hypergraph theory is now developing at and accelerating rate, a change which several
members of the organising committee has played an important role in. All members of the organising
committee has previously worked in several of these areas, but each with different emphasis in topics,
and this programme aimed to bring together people who could continue to transfer methods both
from graph theory to hypergraphs, but also see how some of the new methods developed for
hypergraph problem can be applied to graph theory.
We had several long staying participant from both Europe, the USA and Canada who provided a
continuity in the activities at the institute and many short and medium time visitors, some of which
came for several shorter visits. This provided good opportunities for new contacts, and several of the
visitors had previously only met briefly, or not at all, even though they knew each others works well.
This extended contact turned out to be very fruitful for initiating new joint projects which have
continued after the end of the programme. The participants were a blend of senior and younger
researchers, the youngest participants were still PhD student and some participants published their
first papers in the mid 1960's.
Our regular programme activities were seminars on Tuesday and Thursday, typically preceded by a
larger group of participants going out for lunch together, and a biweekly problem session. In the
problem session any participant who wished to do so presented one or several research problems
which they wanted to draw attention to, often these were new problems posed by the participants but
some were older problems which were put in a new context. This was done in the early evening and
followed by a social activity in the form of a dinner buffet free discussions. These sessions were much
appreciated and many of the posed problem were written up as a problem collection which is available
on the programme web page and in the preprint series. In several cases participants in the audience
of these session were able to make new contributions to the problems, and in a few cases even solve
them, thereby leading to new joint papers.
Let us mention just some of the work which was done during the programme:
Andrew Thomason produced a paper with a refined version of the "container construction" for graphs
and hypergraphs. This is a new and very general tool for proving counting and structure results in
extremal graph and hypergraph theory. During the programme Andrzej Rucinski used this method to
prove, among other things, an exponential upper bound for the Ramsey theoretical Folkman numbers,
for which the existing bounds from the 1970's were of tower type.
Bill Jackson, with different coauthors, proved several new results on rigidity of geometrical
embeddings of graphs, including a new polynomial time decision algorithm for some of these
problems.
Daniel Kral and his coauthors worked on several problems concerning flag algebras and the recently
developed theory for graphons, which are limit structures for convergent sequences of finite graphs.
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Henry Kierstead and Alexandr Kostochka worked on several problems concerning the cycle structure
of graphs, and among other things resolved a question by Dirac which had been open since 1963.
Further work on graph cycles was done by Allen, Boettcher, Hladky, Piguet, Sudakov, and Verstraete.
A number of different problem concerning directed graph were pursued by Jorgen Bang-Jensen and
his collaborators.
Andras Gyarfas, Ervin Gyori, Miklos Simonovits reslolved an open question on the density of
hypergraphs avoiding certain cycles. Results on problems of the same type were also given by Zoltan
Furedi and Tao Jiang.
Various graph colouring problems were studied by Andren, Asratian, Casselgren and Markström.
Thomassen and Markströmom studied Turan type problems in multipartite hypergraphs.
Organizing committee
Magnus M.
Halldorsson
Klas
Markström
Andrzej
Rucinski
Carsten
Thomassen
The Institute hosted 76 researchers, 8 women and 68 men, who together spent 113 man-months
working at the Institute during 14 January – 14 May.
Women and men
Women
Men
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants spring
First name Last name
Peter
Allen
Affiliation
Country
Lina
Andrén
Umeå University
Sweden
Sylwia
Antoniuk
Adam Mickiewicz University
Poland
Armen
Asratian
Linköping University
Sweden
Jörgen
Backelin
Stockholm University
Sweden
Joergen
Bang-Jensen
University of Southern Denmark
Denmark
Anders
Björner
KTH Royal Institute of Technology
Julia
Böttcher
The London School of Economics and
Political Science (LSE)
United Kingdom
Carl Johan
Casselgren
Linköping University
Sweden
Demetres
Christofides
The University of Central Lancashire,
UCLan Cyprus
Cyprus
David
Conlon
University of Oxford
United Kingdom
Derek G.
Corneil
University of Toronto
Canada
Andrzej
Dudek
Western Michigan University
United States
Michael
Elkin
Ben Gurion University of the Negev
Israel
Alexander
Engström
Aalto University
Finland
Victor
Falgas-Ravry
Umeå University
Sweden
Fedor
Fomin
University of Bergen
Norway
Jacob
Fox
Massachusetts Institute of Technology,
MIT
United States
Zoltan
Furedi
University of Illinois at UrbanaChampaign
United States
Jaroslaw
Grytczuk
University of Zielona Góra
Poland
Andras
Gyarfas
Alfréd Rényi Institute of Mathematics,
Hungarian Academy of Sciences
Hungary
Ervin
Gyori
Alfred Renyi Institute of Mathematics
Hungary
Hossein
Hajiabolhassan DTU Mathematics, Technical University
of Denmark
Denmark
Magnus M.
Halldorsson
Reykjavik University
Iceland
Penny
Haxell
University of Waterloo
Canada
Jan
Hladky
University of Warwick
United Kingdom
Johan
Håstad
KTH Royal Institute of Technology
Sweden
Bill
Jackson
Queen Mary, University of London
United Kingdom
Svante
Janson
Uppsala University
Sweden
Tao
Jiang
Miami University
United States
Michal
Karonski
Adam Mickiewicz University
Poland
Hal
Kierstead
Arizona State University
Sweden
Tereza
Klimosova
University of Warwick
United Kingdom
Alexandr V. Kostochka
University of Illinois at UrbanaChampaign
United States
Dariusz
University of Liverpool
United Kingdom
Kowalski
The London School of Economics and
Political Science (LSE)
United Kingdom
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Daniel
Kral
Charles University in Prague
United Kingdom
Michael
Krivelevich
Tel-Aviv University
Israel
Joel
Larsson
Umeå University
Sweden
Imre
Leader
University of Cambridge
United Kingdom
Svante
Linusson
KTH Royal Institute of Technology
Sweden
Allan
Lo
University of Birmingham
United Kingdom
Zbigniew
Lonc
Warsaw University of Technology
Poland
Laszlo
Lovasz
Massachusetts Institute of Technology,
MIT
United States
Vadim
Lozin
University of Warwick
United Kingdom
Tomasz
Luczak
Adam Mickiewicz University
Poland
Klas
Markström
Umeå University
Sweden
Brendan
McKay
Australian National University
Australia
Dhruv
Mubayi
University of Illinois at Chicago
United States
Jakob
Nordström
KTH Royal Institute of Technology
Sweden
Diana
Piguet
University of Birmingham
United Kingdom
Oleg
Pikhurko
University of Warwick
United Kingdom
Pawel
Pralat
Ryerson University
Canada
Andrzej
Proskurowski
University of Oregon
United States
Tomasz
Prytula
University of Copenhagen
Denmark
Yuri
Rabinovich
University of Haifa
Israel
Stanislaw P. Radziszowski
Rochester Institute of Technology, RIT
United States
Bruce
Richter
University of Waterloo
Canada
Andrzej
Rucinski
Emory University
Poland
Miklos
Ruszinko
MTA SZTAKI Computer and
Automation Research Institute,
Hungarian Academy of Sciences
Hungary
Gabor
Sarkozy
Worcester Polytechnic Institute
United States
Matas
Sileikis
Uppsala University
Sweden
Miklos
Simonovits
Alfréd Rényi Institute of Mathematics
Hungary
Jozef
Skokan
The London School of Economics and
Political Science (LSE)
United Kingdom
Fei
Song
Umeå University
Sweden
Matthew
Stamps
Aalto University
Sweden
Benjamin
Sudakov
UCLA
United States
Edyta
Szymanska
Adam Mickiewicz University
Poland
John
Talbot
University College London
United Kingdom
Anusch
Taraz
Technische Universität München
Germany
Andrew
Thomason
University of Cambridge
United Kingdom
Carsten
Thomassen
DTU Mathematics, Technical University
of Denmark
Denmark
Helge
Tverberg
University of Bergen
Norway
Jan
van den Heuvel The London School of Economics and
Political Science (LSE)
United Kingdom
Jacques
Verstraete
United States
University of California, San Diego
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Mariusz
Wozniak
AGH University of Science and
Technology
Poland
Cui
Zhang
DTU Mathematics, Technical University
of Denmark
Denmark
Seminars
Alexander Engström
Finding extremal objects in Algebraic Geometry using Graph Theory
Klas Markström
Complete subgraphs of t-partite hypergraphs
Carsten Thomassen
Orientations of infinite graphs
Andras Gyarfas
Packing trees into n-chromatic graphs
Bill Jackson
Rigidity of point-line frameworks
Alexandr V. Kostochka
A trick for proving properties of (a,b)-sparse graphs
Tomasz Luczak
On the chromatic number of generalized shift graphs
Miklos Simonovits
Embedding trees into graphs
Andrew Thomason
Independent sets in hypergraphs
Helge Tverberg
On the reconstruction of a graph with large diameter
Zoltan Furedi
Zykov’s symmetrization for multiple graphs, a new tool for Turán type problems
with an application to Erdos’ conjecture on pentagonal edges
Fedor Fomin
Cluster Editing and subexponential algorithms
Magnus M. Halldorsson
Coloring edge-weighted (di)graphs
Joergen Bang-Jensen
(Arc-)disjoint (branching) flows in networks}
Joergen Bang-Jensen
On problems concerning (arc-)disjoint structures in a digraph
Andrzej Proskurowski
More graph width parameters and minors: linear rankwidth and vertex minors
Penny Haxell
Morphing planar graphs
Penny Haxell
Extremal graphs for connectedness
Daniel Kral
Quasirandomness of permutations
Hal Kierstead
Equitable Coloring of Graphs and Digraphs
Ervin Gyori
On 2-factors of k cycles
Bruce Richter
On Zarankiewicz' conjecture: the crossing number of K(m,n)
Benjamin Sudakov
Judicious partitions of graphs
Benjamin Sudakov
The minimum number of nonnegative edges in hypergraphs
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Michael Krivelevich
Large subgraphs without short cycles
David Conlon
The Erd\H{o}s-Gy\'arf\'as problem on generalized Ramsey numbers
Dhruv Mubayi
Independent Sets in Hypergraphs
Imre Leader
Partition Regular Equations
Jacob Fox
Combinatorics of Permutations
Brendan McKay
Notes on switching reconstruction
Andrzej Dudek
On Ramsey-type problems for sequences and permutations
Michael Elkin
Distributed Graph Coloring and Other Symmetry Breaking Problems
Jacques Verstraete
Extremal Theorems for Trees and Cycles in Hypergraphs
Oleg Pikhurko
Measurable edge-colourings of graphings
Jaroslaw Grytczuk
Nonrepetitive colorings of graphs
Jan Hladky
Loebl-Komlos-Sos Conjecture and embedding trees in sparse graphs
Zbigniew Lonc
Constructions of short k-radius sequences
Diana Piguet
An approximate version of the Tree Packing Conjecture
Victor Falgas-Ravry
Separating path systems
Carl Johan Casselgren
Interval edge colorings of (a,b)-biregular bipartite graphs
Peter Allen
Tight cycles and regular slices in dense hypergraphs
Julia Böttcher
Sparse blow-up lemmas and maker-breaker games
Yuri Rabinovich
On multiplicative (1+\epsilon)-approximation by a small sample,
with some geometric applications
Miklos Ruszinko
Uniform Hypergraphs Containing no Grids
Anusch Taraz
Limiting probabilities for properties of random planar graph
Mariusz Wozniak
Vertex distinguishing colorings of graphs
Lina Andrén
Avoiding uniform arrays and related problems of list-coloring edges
Tereza Klimosova
Infinite dimensional finitely forcible graphon
Matas Sileikis
Half-sandwich of random graphs
Jan van den Heuvel
From distance-2-colourings of graphs to colourings of hypergraphs
Stanislaw P. Radziszowski
Bounds on Shannon Capacity and Ramsey Numbers from Product of Graphs
Derek G. Corneil
Graph Searches, Cocomparability Graphs and Posets
Dariusz Kowalski
Efficient distributed graph algorithms in wireless networks
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Gabor Sarkozy
Monochromatic covers in edge-colored graphs and hypergraphs
Tao Jiang
The expansion method in Turan problems
Vadim Lozin
Deciding Bell number for hereditary graph properties
Demetres Christofides
Approximate Isoperimetric Inequalities
Joel Larsson
Minimum matching, replica symmetry, and exploration games
Laszlo Lovasz
The height of the tower in the Regularity Lemma
Armen Asratian
Some problems and results on transformations of edge colorings of graphs
Sylwia Antoniuk
A prompt collapse of the random triangular group
Allan Lo
Proof of the 1-factorization and Hamilton decomposition conjectures
Edyta Szymanska
Approximate Counting of Matchings in (3,3)-graphs
Jozef Skokan
Improved counting relative to pseudorandom graphs
Pawel Pralat
A few random open problems, some of them for random graphs
Hossein Hajiabolhassan
On Alternating Chromatic Number
Cui Zhang
Non-Cayley vertex-transitive graphs and non-Cayley numbers
Michal Karonski
Locally irregular hypergraph labelings
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Preprints
01 Simple containers for simple hypergraphs - David Saxton, Andrew Thomason
02 Approximate Counting of Matchings in (3,3)-Hypergraphs - Andrzej Dudek, Marek Karpinski,
Andrzej Ruciński, Edyta Szymańska
03 Combinatorial Conditions for the Unique Completability of Low Rank Matrices - Bill Jackson,
Tibor Jordan, Shin-Ichi Tanigawa
04 First order convergence and roots - Demetres Christofides, Daniel Kral
05 A density Corradi--Hajnal Theorem - Peter Allen, Julia Boettcher, Jan Hladky, Diana Piguet
06 Counting flags in triangle-free digraphs - Jan Hladky, Daniel Kral, Serguei Norine
07 Infinite dimensional finitely forcible graphon - Roman Glebov, Tereza Klimosova, Daniel Kral
08 Cycles in triangle-free graphs of large chromatic number - Alexandr Kostochka, Benny Sudakov,
Jacques Verstraete
09 Packing six T-joins in plane graphs - Zdenek Dvorak, Ken-ichi Kawarabayashi, Daniel Kral
10 ON THE CORRADI-HAJNAL THEOREM AND A QUESTION OF DIRAC - Henry Kierstead,
Alexandr Kostochka, Elyse Yeager
11 Deciding the Bell number for hereditary graph properties - Aistis Atminas, Andrew Collins, Jan
Foniok, Vadim Lozin
12 The asymptotic complexity of matrix reduction over finite fields - Demetres Christofides
13 The $(2k-1)$-connected multigraphs with at most $k-1$ disjoint cycles - Henry Kierstead,
Alexandr Kostochka, Elyse Yeager
14 An alternative proof of the linearity of the size-Ramsey number of paths - Andrzej Dudek, Pawel
Pralat
15 Acquaintance time of random graphs near connectivity threshold - Andrzej Dudek, Pawel Pralat
16 The phase transition in site percolation on pseudo-random graphs - Michael Krivelevich
17 A characterisation of the generic rigidity of 2-dimensional point-line frameworks - Bill Jackson,
John Owen
18 An exponential-type upper bound for Folkman numbers - Vojtech Rodl, Andrzej Rucinski, Mathias
Schacht
19 On Some Open Questions for Ramsey and Folkman Numbers - Xiaodong Xu, Stanisław
Radziszowski
20 Edge coloring multigraphs without small dense subsets - Penny Haxell, Henry Kierstead
21 On Chromatic Number and Minimum Cut - Meysam Alishahi, Hossein Hajiabolhassan
22 The complexity of finding arc-disjoint branching flows - Jørgen Bang-Jensen, Frederic Havet,
Anders Yeo
23 Balanced branchings in digraphs - Jørgen Bang-Jensen, Anders Yeo
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
24 Counting flags in triangle-free digraphs - Jan Hladky, Daniel Kral, Serguei Norine
25 Distinguishing graphs by total colourings - Rafal Kalinowski, Monika Pilsniak, Mariusz Wozniak
26 On the choice number of complete multipartite graphs with part size four - H. A. Kierstead,
Andrew Salmon, Ran Wang
27 Solution of Vizing’s Problem on Interchanges for Graphs with Maximum Degree 4 and Related
Results - A. S. Asratian, C. J. Casselgren
28 Hadwiger’s Conjecture for inflations of 3-chromatic graphs - Carl Johan Casselgren, Anders Sune
Pedersen
29 A Note on Vertex Coloring Edge-Weighted Digraphs - Joergen Bang-Jensen, Magnus Halldorsson
30 Restricted cycle factors and arc-decompositions of digraphs - Jørgen Bang-Jensen, Carl Johan
Casselgren
31 The minimum number of triangular edges and a symmetrization for multiple graphs - Zoltan
Furedi, Zeinab Maleki
32 Full subgraphs - Victor Falgas-Ravry, Klas Markström, Jacques Verstraete
33 On 3-uniform hypergraphs without linear cycles - Andras Gyarfas, Ervin Gyori, Miklos Simonovits
34 Linear Turan numbers of linear cycles and cycle-complete Ramsey numbers - Tao Jiang, Clayton
Collier-Cartaino, Nathan Graber
35 On 3-uniform hypergraphs without a cycle of a given length - Zoltan Furedi, Lale Ozkahya
36 Antistrong digraphs - Jørgen Bang-Jensen, Stephane Bessy, Bill Jackson, Matthias Kriesell
37 Small dense subgraphs of a graph - Tao Jiang, Andrew Newman
38 Edge coloring multigraphs without small dense subsets
Penny Haxell, Henry Kierstead
39 Liftings in finite graphs and linkages in infinite graphs
Seongmin Ok, R Bruce Richter, Carsten Thomassen
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INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Homogenization and Random Phenomenon, fall - Scientific report
The IML program Random Phenomena took place during fall 2014. A large number of participants
backed up the program by attending various seminars, and activities. The program started with a short
introductory school, and a follow-up workshop in the first and second weeks. After these
introductions, the program continued in a usual fashion with weekly seminars (Tuesdays and
Thursday), with an average of 4 seminars a week. We also had a few shorter courses that was thought
as outreach for postdocs and early career persons.
The introductory school included talks by Felix Otto on the topic of quantitative stochastic
homogenization, and a few other presentation on quantitative analysis in homogenization. A general
introductory talk was also presented by P. Souganidis on stationary ergodic homogenization.
Besides these, various aspects on the homogenizations and the methodology was treated and
discussed. Specific topics treated in the program ranged over several areas, which were interconnected
through a random feature. The main topic of homogenization, constitute the backbone of the program.
This topic has in recent years taken a central part in nonlinear PDE, and has tentacled to many areas.
Based on this diverse and large span of applications and connections we invited several people in the
vicinity of the topic that could interact with other people in other areas, but similar type of questions.
In particular we had the following themes covered by the program:
•
Homogenization for first and second order PDE in oscillatory random environments
•
Interfaces and free boundary problems in random media
•
Random walks in random environments
•
Numerical methods
•
Multi-scale numerical methods, dynamical systems.
The program invited three experts for short courses according to the following list:
Björn Engquist: Numerical homogenization and heterogenous multi scale methods.
Andrey Piatniski: Homogenization of elliptic spectral problems.
Elena Kosygina: On the connection between large deviations of diffusions in random environments
and homogenization of some stochastic HJB-equations.
The broader topics in the program included the following areas:
Stochastic homogenization, Homogenization of Oscillating Boundary Data, quantitative stochastic
homogenization, Fully nonlinear equation and homogenization, Multiscale methods, front propagation
in stratified media, Weak KAM theory, Random polymers and their fluctuations, problems in
perforated domains, viscosity methods in homogenization, and many more.
The program brought together many scientist in diverse areas, with common interest of understanding
complex phenomena that underlies several problems in physics, and biology. The group have benefited
from the program by linking to other scientists with common interests but different methods of
approach.
There is now a few smaller continuation of the IML program, which will take place at other research
institutes during 2015.
14
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Organizing committee
Luis Caffarelli, Pierre-Louis Lions, Henrik Shahgholian, Panagiotis Souganidis and
Srinivasa Varadhan.
The Institute hosted 72 researchers, 17 women and 55 men, who together spent 58 man-months
working at the Institute during 1 September – 12 December.
Women and men
Women
Men
15
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants fall
First name
Last name
Affiliation
Country
Gohar
Aleksanyan
KTH Royal Institute of Technology
Sweden
John
Andersson
KTH Royal Institute of Technology
Sweden
Doghonay
Arjmand
KTH Royal Institute of Technology
Sweden
Scott N.
Armstrong
CEREMADE
France
Agnid
Banerjee
Purdue University
United States
Erich
Baur
University of Zurich, UZH
Switzerland
Erwin
Bolthausen
University of Zurich, UZH
Switzerland
Giuseppe
Buttazzo
University of Pisa
Italy
Annalisa
Cesaroni
University of Padova
Italy
Adina
Ciomaga
The University of Chicago
United States
Andrea
Davini
University of Rome
Italy
Boualem
Djehiche
KTH Royal Institute of Technology
Sweden
Björn
Engquist
KTH Royal Institute of Technology
Sweden
Will
Feldman
University of California, UCLA
United States
Morteza
Fotouhi
Sharif University
Christina
Frederick
University of Texas at Austin
Islamic Republic Of
Iran
United States
Hermano
Frid
IMPA
Brazil
Antoine
Gloria
Université libre de Bruxelles
Belgium
Björn
Gustafsson
KTH Royal Institute of Technology
Sweden
Eric
Hall
KTH Royal Institute of Technology
Sweden
Harsha
Hutridurga
University of Cambridge
United Kingdom
Hitoshi
Ishii
Waseda University
Japan
Karl
Jonsson
KTH Royal Institute of Technology
Sweden
Willi
Jäger
Heidelberg University
Germany
Aram
Karakhanyan
University of Edinburgh
United Kingdom
Anna S.
Khripunova Balci Vladimir State University
Russian Federation
Sunghan
Kim
Seoul National University
Republic of Korea
Inwon
Kim
University of California, UCLA
United States
Herbert
Koch
University of Bonn
Germany
Leonid
Koralov
University of Maryland
United States
Elena
Kosygina
Baruch College
United States
Claude
Le Bris
CERMICS
France
Ki-Ahm
Lee
Seoul National University
Republic of Korea
Yachun
Li
Shanghai Jiao Tong University
China
Jessica
Lin
The University of Chicago
United States
Erik
Lindgren
NTNU - Norwegian University of
Science and Technology
Sweden
Pierre
Mathieu
Aix-Marseille University
France
Vladimir
Maz'ya
Linköping University
Sweden
Andreas
Minne
KTH Royal Institute of Technology
Sweden
Jean-Christophe
Mourrat
École polytechnique fédérale de
Lausanne
France
Hayk
Aleksanyan
University of Edinburgh
United Kingdom
16
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Cyrill
Muratov
New Jersey Institute of Technology
United States
Matteo
Novaga
University of Pisa
Italy
Felix
Otto
Max-Planck Institut
Germany
Svetlana
Evgenievna
Pastukhova
Moscow State Institute of Radio
Engineering, Electronics and
Automation, MIREA
Russian Federation
Stefania
Patrizi
Weierstrass Institute
Germany
Lars-Erik
Persson
Luleå Technical University
Sweden
Andrey L.
Piatnitski
Narvik University College
Norway
Christophe
Prange
The University of Chicago
United States
Maria Alessandra
Ragusa
University of Catania
Italy
Maria
Saprykina
KTH Royal Institute of Technology
Sweden
Russell
Schwab
Michigan State University
United States
Sylvia
Serfaty
Pierre-and-Marie-Curie University
France
Henrik
Shahgholian
KTH Royal Institute of Technology
Sweden
Wenhui
Shi
Hausdorff Center for Mathematics
Germany
Antonio
Siconolfi
University of Rome
Italy
Olena
Sivak
Per
Sjölin
KTH Royal Institute of Technology
Sweden
Charles K.
Smart
Massachusetts Institute of
Technology, MIT
United States
Mariana
Smit Vega Garcia Purdue University
Panagiotis
Souganidis
The University of Chicago
Martin
Strömqvist
KTH Royal Institute of Technology
Sweden
Anders
Szepessy
KTH Royal Institute of Technology
Sweden
Richard
Tsai
University of Texas at Austin
United States
Jack
Xin
University of California, Irvine
United States
Karen
University of Zurich, UZH
Switzerland
Atilla
Yeressian
Negarchi
Yılmaz
Bogaziçi University
Turkey
Minha
Yoo
National Institute for Mathematical Republic of Korea
Science, NIMS
Yifeng
Yu
University of California, Irvine
United States
Ofer
Zeitouni
Weizmann Institute of Science
Israel
Vasily V.
Zhikov
Vladimir State University
Russian Federation
Nikolaos
Zygouras
University of Warwick
United Kingdom
Germany
17
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Seminars
Panagiotis Souganidis
Introductory program: A overview of stochastic homogenization
Will Feldman
Introductory program: Homogenization of Oscillating Boundary Data
Scott N. Armstrong
Introductory program: Quantitative stochastic homogenization and
quenched higher regularity for nonlinear elliptic equations
Felix Otto
Introductory program: A calculus for quantitative stochastic homogenization
Claude Le Bris
Between nonperiodic and stochastic homogenization
Inwon Kim
Free boundaries and homogenization
Annalisa Cesaroni
Multiscale financial models with stochastic volatility
Adina Ciomaga
Homogenization of moving interfaces
Sylvia Serfaty
Large systems with Coulomb and Riesz interactions
Jean-Christophe Mourrat
Scaling limit of fluctuations in homogenization of divergence-form operators
Russell Schwab
Neumann Homogenization via Integro-Differential Operators
Hermano Frid
A note on the stochastic weakly almost periodic homogenization
of fully nonlinear elliptic and parabolic equations
Antoine Gloria
Quantitative central limit theorem for the effective conductance
Jessica Lin
Stochastic Homogenization for Fully Nonlinear
Uniformly Parabolic Equations
Atilla Yılmaz
Large deviations for random walks in random environments
Christophe Prange
Uniform estimates in domains with oscillating boundaries
Giuseppe Buttazzo
Relaxed Dirichlet problems by homogenization and r
elated optimization issues
Panagiotis Souganidis
Periodic approximations of the ergodic constant in
stationary ergodic environments
Willi Jäger
Multiscale modelling and simulation of processes in membranes and tissues
– applications in life sciences
Antonio Siconolfi
Weak KAM techniques for singularly perturbed optimal control problems
Cyrill Muratov
Front Propagation in Sharp and Diffuse Interface Models of Stratified Media
Matteo Novaga
Some remarks on mean curvature flow in heterogeneous media
Nikolaos Zygouras
Random polymers and their fluctuations
Hitoshi Ishii
Metastability for parabolic equations with drift
Vladimir Maz'ya
Uniform asymptotics of Green's kernels in perforated domains and
meso-scale approximations
18
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Mariana Smit Vega Garcia New developments in the lower-dimensional obstacle problem with
Lipschitz coefficients
Jack Xin
G-equations and Front Motion in Fluid Flows
Ki-Ahm Lee
Viscosity Method for Homogenizations
Vasily V. Zhikov
On passage to the limit in nonlinear elliptic and parabolic problems
Stefania Patrizi
Crystal dislocations with different orientation and collisions
Yifeng Yu
Random Homogenization of Non-Convex Hamilton-Jacobi Equations in 1d
Andrey L. Piatnitski
Homogenization of low temperature spin systems
Hayk Aleksanyan
Convergence rates in periodic homogenization of Dirichlet problem
for divergence type elliptic systems
Anna S. Khripunova Balci
Variational convergence of integrands with non-standart growth conditions
Karen Yeressian Negarchi
Regularity of the free boundary in the obstacle problem with
a degenerate force term
Leonid Koralov
Transition from homogenization to averaging in cellular flows
Yachun Li
Local Well-posedness of Compressible Navier-Stokes Equations
with Degenerate Viscosity
Andrea Davini
On a selection principle in the ergodic approximation
of the Hamilton-Jacobi equation
Svetlana Evgenievna
Pastukhova
Homogenization of monotone operators with oscillating
exponent of nonlinearity
Elena Kosygina
On the connection between large deviations of diffusions in
random environments and homogenization of some stochastic
Hamilton-Jacobi-Bellman (HJB) equations
Wenhui Shi
Higher regularity of the free boundary in the thin obstacle problem
Christina Frederick
Multiscale models for inverse homogenization
Harsha Hutridurga
Homogenization of weakly coupled cooperative parabolic systems
Pierre Mathieu
Scaling limits of diffusions in a random environment
Olena Sivak
Asymptotic approximations for solutions to elliptic
boundary-value problems in perforated domains
Sunghan Kim
Higher order convergence rate in periodic homogenization
for equations in non-divergence form
Andrey L. Piatnitski
Homogenization of elliptic spectral problems with sign changing
Björn Engquist
Numerical Homogenization
Björn Engquist
The Heterogeneous Multiscale Method
19
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Lars-Erik Persson
Homogenization of evolution Stokes equation with
two small parameters via two-scale convergence
Andrey L. Piatnitski
Homogenization of elliptic spectral problems with sign changing
Charles K. Smart
The scaling limit of the Abelian sandpile on periodic graphs
Maria Saprykina
Examples of Hamiltonian systems with Arnold diffusion
Aram Karakhanyan
On a conjecture of De Giorgi related to homogenisation
Ofer Zeitouni
An introduction to limit laws for exit measures in random environment
Maria Alessandra Ragusa
Current New Results for Solutions of Partial Differential Equations and Systems
Erich Baur
Random Walks in Random Environment (RWRE) in the small disorder regime
Martin Strömqvist
The Dirichlet problem in certain varying domains
Erwin Bolthausen
On the Edward's model and its relations with weakly self-avoiding walks
Olof Runborg
Multiscale methods for wave propagation problems
Richard Tsai
A multiscale method coupling network and continuum models in porous media
Preprints
01 Lipschitz regularity for elliptic equations with random coefficients
Scott Armstrong, Jean-Christophe Mourrat
02 Algebraic Error Estimates for the Stochastic Homogenization of Uniformly Parabolic Equations
Jessica Lin, Charles Smart
03 Regularity of boundary data in periodic homogenization of elliptic systems in layered media
Hayk Aleksanyan
04 A note on the stochastic weakly* almost periodic homogenization of fully nonlinear elliptic
equations
Hermano Frid
05 Modica type gradient estimates for an inhomogeneous variant of the normalized p-laplacian
evolution
Agnid Banerjee, Nicola Garofalo
20
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants from and in the Nordic Countries
1 September – 12 December
14 January – 14 May
First name
Last name
Country
First name
Last name
Country
Piatnitski
Norway
Joergen
Bang-Jensen
Denmark
Andrey L.
Hossein
Hajiabolhassan
Denmark
Gohar
Aleksanyan
Sweden
Tomasz
Prytula
Denmark
John
Andersson
Sweden
Carsten
Thomassen
Denmark
Doghonay
Arjmand
Sweden
Cui
Zhang
Denmark
Boualem
Djehiche
Sweden
Alexander
Engström
Finland
Björn
Engquist
Sweden
Magnus M.
Halldorsson
Iceland
Björn
Gustafsson
Sweden
Fedor
Fomin
Norway
Eric
Hall
Sweden
Helge
Tverberg
Norway
Karl
Jonsson
Sweden
Lina
Andrén
Sweden
Erik
Lindgren
Sweden
Armen
Asratian
Sweden
Vladimir
Maz'ya
Sweden
Jörgen
Backelin
Sweden
Andreas
Minne
Sweden
Anders
Björner
Sweden
Lars-Erik
Persson
Sweden
Carl Johan
Casselgren
Sweden
Olof
Runborg
Sweden
Victor
Falgas-Ravry
Sweden
Maria
Saprykina
Sweden
Johan
Håstad
Sweden
Henrik
Shahgholian
Sweden
Svante
Janson
Sweden
Per
Sjölin
Sweden
Joel
Larsson
Sweden
Martin
Strömqvist
Sweden
Svante
Linusson
Sweden
Anders
Szepessy
Sweden
Klas
Markström
Sweden
Jakob
Nordström
Sweden
Matas
Sileikis
Sweden
Fei
Song
Sweden
Matthew
Stamps
Sweden
21
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Shorter programs
During 2014 the Institute arranged five workshops and conferences, two summer schools and one RIPprogram.
Random Matrices and Jacobi operators, May - Scientific report
The subject of the workshop was the interplay between topics in random matrix theory and the theory
of Jacobi operators. Several talks were given by experts from both fields, bringing into light various
connections and formulating interesting problems. Ample time was given to discussion, including two
open problem sessions. As a direct consequence of this activity an open problem posed by Arno
Kuijlaars was solved during that week. Other problems that were presented during the workshop have
lead to further research and discussions. All in all, we feel the workshop has achieved its goal of
bringing researchers from different communities together in fruitful discussions that we are sure will
have significant impact on both fields.
Organizing committee
Jonathan Breuer, The Hebrew University of Jerusalem and Maurice Duits, Stockholm University.
Participants
First name Last name
Gernot
Akemann
Affiliation
Country
Alexander
Aptekarev
Keldysh Institute of Applied Mathematics
Russian Federation
Jinho
Baik
University of Michigan
United States
Pavel
Bleher
Indiana University-Purdue University
United States
Jonathan
Breuer
The Hebrew University of Jerusalem
Israel
Sunil
Chhita
KTH Royal Institute of Technology
Sweden
Bielefeld University
Germany
22
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Tom
Claeys
Université Catholique de Louvain
Belgium
Maurice
Duits
Stockholm University
Sweden
Erik
Duse
KTH Royal Institute of Technology
Sweden
Alan
Edelman
Massachusetts Institute of Technology, MIT
United States
Latif
Eliaz
Hebrew University
Israel
Jeff
Geronimo
Georgia Institute of Technology
United States
Vadim
Gorin
Massachusetts Institute of Technology, MIT
United States
Adrien
Hardy
KTH Royal Institute of Technology
Sweden
Kurt
Johansson
KTH Royal Institute of Technology
Sweden
Rostyslav
Kozhan
KTH Royal Institute of Technology
Sweden
Igor
Krasovsky
Imperial College London
United Kingdom
Arno
Kuijlaars
KU Leuven
Belgium
Gaultier
Lambert
KTH Royal Institute of Technology
Sweden
Yoram
Last
Hebrew University
Israel
Seung-Yeop Lee
University of South Florida
United States
Andrei
Martinez-Finkelshtein
Universidad de Almeria
Spain
Anthony
Metcalfe
KTH Royal Institute of Technology
Sweden
Leonid
Petrov
Northeastern University
United States
Boris
Shapiro
Stockholm University
Sweden
Alexander
Sodin
Princeton University
United States
Eugene
Strahov
Hebrew University
Israel
Vilmos
Totik
University of Szeged
Hungary
Bálint
Virág
University of Toronto
Canada
Modern aspects of the Titchmarsh-Weyl m-function and its
multidimensional analogues, May - Scientific report
The main objective of the workshop “Modern aspects of the Titchmarsh-Weyl m-function and its
multidimensional analogues” was to discuss and to review the recent developments in spectral analysis
of ordinary and partial differential operators via Titchmarsh-Weyl m-functions, Dirichlet-to-Neumann
maps, and their abstract analogs from extension theory of symmetric operators in Hilbert spaces.
Special attention was paid on the inverse problem to determine the spectral data of self-adjoint elliptic
differential operators on unbounded domains from the knowledge of an associated Dirichlet-toNeumann or Robin-to-Neumann map. Although it has become clear during the meeting that in the
self-adjoint setting the inverse spectral problem can be solved in a satisfactory way, the analogous
inverse problem for non-self-adjoint elliptic partial differential operators was highlighted as one of
future challenges in the field.
Besides inverse problems in spectral analysis of differential operators the following closely connected
topics where discussed during the workshop: Differential operators and Titchmarsh-Weyl m-functions
on graphs, perturbation problems and singular interactions, left-definite Sturm-Liouville operators,
Dirac operators, and nonlinear boundary value problems.
The workshop was attended by invited experts from Europe and the US working in the areas of
differential equations and operator theory. The programme of lectures was full, but ample time was
allowed for discussion, and the organisers are confident that the aims of the meeting to review
progress in an important area of research, foster interaction and encourage collaboration, were
realised. The ideal setting of the Mittag-Leffler Institute for study and research were greatly
appreciated by all the participants. Also the helpful administration and friendly atmosphere
contributed to making the meeting a success.
23
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Organizing committee
Jussi Behrndt, Graz University of Technology, Malcolm Brown, Cardiff University and
Desmond Evans, Cardiff University.
Participants
First name
Last name
Affiliation
Country
Christer
Bennewitz
Lund University
Sweden
Malcolm
Brown
Cardiff University
United Kingdom
Jonathan
Eckhardt
Cardiff University
United Kingdom
Desmond
Evans
Cardiff University
United Kingdom
Fritz
Gesztesy
University of Missouri
United States
Evgeny
Korotyaev
Saint Petersburg State University
Russian Federation
Pavel
Kurasov
Stockholm University
Sweden
Heinz
Langer
Vienna University of Technology
Austria
Matthias
Langer
University of Strathclyde
United Kingdom
Vladimir
Lotoreichik
Graz University of Technology
Austria
Annemarie
Luger
Stockholm University
Sweden
Sergey
Naboko
Saint Petersburg State University
Russian Federation
Christoph
Neuner
Stockholm University
Sweden
Konstantin
Pankrashkin
Université Paris-Sud
France
Andrea
Posilicano
University of Insubria
Italy
Jonathan
Rohleder
Graz University of Technology
Austria
Karl-Michael
Schmidt
Cardiff University
United Kingdom
Rune
Suhr
Stockholm University
Sweden
Gerald
Teschl
University of Vienna
Austria
Jussi
Behrndt
Graz University of Technology
Austria
24
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Christiane
Tretter
University of Bern
Switzerland
Carsten
Trunk
Ilmenau University of Technology
Germany
Ian
Wood
University of Kent
United Kingdom
Kleindagarna 2014, June - Scientific report
At the Klein Conference, June 13-15 2014, 21 selected upper secondary school teachers and 7
professors and lecturers from universities met at Institut Mittag-Leffler for three inspiring days. The
upper secondary school teachers’ expertize in teaching was combined with the mathematicians’
expertize. Together the participants develop mathematics lessons for upper secondary school while at
the same time developing their own knowledge about mathematics and teaching of mathematics.
Four cycles, all including a mathematical lecture, a workshop in groups and a common discussion, was
completed in the first two days. The final day was used to finalize the lessons. After the conference the
lessons were tested in a classroom before the lesson was documented by so called Lesson Pilots before
distribution.
The organizers of the conference where ICMI-Sweden (Svenska kommittén för matematikutbildning),
Institut Mittag-Leffler and The National Committee for Mathematics (Nationalkommittén för
matematik), and it was financed by Brummer & Partners. Lectures where given by Qimh Xatcha,
Sorina Barza and Jan-Fredrik Olsén. The Lesson Pilots where Laura Fainsilber, Anna Persson,
Andreas Minne and Staffan Rodhe. The conference was led by Samuel Bengmark and organized in
close collaboration with Maria Weiss.
The conference got an overwhelmingly positive response among the participants, giving the conference
an average overall impression of 5 out of 5. It also lead to three newspaper articles about the Klein
Conference and Institut Mittag-Leffler. This was the fourth annual Klein Conference at Institut MittagLeffler. With the support of Brummer & Partners we will arrange two separate Klein Conferences in
2015, June 12-14 and August 22-24.
Organizing committee
Samunel Bengmark, Chalmers/University of Gothenburg.
25
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants
First name Last name
Sorina
Barza
Affiliation
Samuel
Bengmark
Chalmers/University of Gothenburg, Göteborg
Anders
Berglund
Rudbeck
Stig
Blommé
Martin Koch-gymnasiet
Laura
Fainsilber
Chalmers/University of Gothenburg, Göteborg
Ana
Fuentes Martinez Katedralskolan, Lund
Erik
Gripenskär
Täby Enskilda Gymnasium
Monica
Göransson Lööf
Hjalmar Strömerskolan
Jonas
Hall
Rodengymnasiet, Norrtälje
Marie
Högberg
Thomasgymnasiet
David
Johansson
Grillska gymnasiet Västerås
Agneta
Larsson
Katedralskolan, Uppsala
Vera
Lundström
Fridhemsgymnasiet Umeå
Andreas
Minne
KTH Royal Institute of Technology, Stockholm
Berthold
Nilsson
Hultsfreds gymnasium
Birgitta
Nilsson
Nacka gymnasium
Fredrik
Nilsson
Lugnetgymnasiet
Karlstads Universitet
Jan-Fredrik Olsén
Lund University, Lund
Anna
Persson
Chalmers/University of Gothenburg, Göteborg
Therese
Pettersson
Thomasgymnasiet
Staffan
Rodhe
Uppsala University, Uppsala
Anna
Rönnbäck
Plusgymnasiet
Leif
Sandström
S:t Mikaelsskolan, Mora
Anna
Stenkvist
Norra Real
Kajsa
Sundqvist
Nyköpings Enskilda gymnasium
Qimh
Xantcha
Uppsala University, Uppsala
Banibal
Yonadam
Täljegymnasiet
Klara
Ölmedal
Malmö Borgarskola, Malmö
Mathematical and Numerical Modeling in Finance, June - Scientific report
The three days of the workshop were divided in morning and early afternoon sessions with
presentations, followed by discussions in groups on various topics. The participants were mainly from
academia but also representatives from industry took part in both presentations and discussions. The
research fields represented at the workshop spanned over stochastic and deterministic models,
methods for option valuation, model calibration, parameter estimation and (stochastic) optimal
control. All this gave a broad and solid experience and lead to interesting discussions that had an
interdisciplinary nature.
The outcome of the workshop was not only the new knowledge that everybody gained, but also new
tentative collaboration partners were found. Several key areas where identified interesting for both
industry and academic R&D like the problem of discrete dividends for option pricing.
A larger collaboration project has already started that was a direct consequence of the workshop.
26
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Organizing committee
Josef Höök, Uppsala University, Elisabeth Larsson, Uppsala University and Lina von Sydow, Uppsala
University.
Participants
First name Last name
Tomas
Björk
Affiliation
Country
Erik
Ekström
Uppsala University
Sweden
Sônia
Gomes
University of Campinas
Brazil
Bertil
Gustafsson
Uppsala University
Sweden
Alfa
Heryudono
University of Massachusetts Dartmouth
United States
Des
Higham
University of Strathclyde
United Kingdom
Simon
Hubbert
Birkbeck, University of London
United Kingdom
Henrik
Hult
KTH Royal Institute of Technology
Sweden
Josef
Höök
Uppsala University
Sweden
Elisabeth
Larsson
Uppsala University
Sweden
Jeremy
Levesley
University of Leicester
United Kingdom
Erik
Lindström
Lund University
Sweden
Per
Lötstedt
Uppsala University
Sweden
Kees
Oosterlee
Centrum Wiskunde & Informatica
Netherlands
Cécile
Piret
Université Catholique de Louvain
Belgium
Tobias
Rydén
Lynx Asset Management
Sweden
Thomas
Schön
Uppsala University
Sweden
Jari
Toivanen
Stanford University
United States
Johan
Tysk
Uppsala University
Sweden
Johan
Walden
University of California, Berkeley
United States
Lina
von Sydow
Uppsala University
Sweden
Stockholm School of Economics
Sweden
27
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Apollonian Circle Packings, July - Scientific report
Overview: The Apollonian Circle Packings Summer School was held at Institut Mittag-Leffler (IML) in
Stockholm during June 23-27, 2014. The Summer School featured lecture series presented by
distinguished lecturers Hee Oh (Yale) and Elena Fuchs (Berkeley) as well as 10 presentations by pairs
of participants. The summer school is documented in a 130 page handbook of expository papers
written by the participants. The plan for the summer school was well-received by the inter- national
community, ultimately receiving the majority of its funding from the Clay Mathematics Institute (for
international participants), the National Science Foundation (for US-based partici- pants), lodging and
meal support from the Institut Mittag-Leffler, and small contributions from the EMS and Number
Theory Foundation.
Scientific focus: The focus of the Summer School is on Apollonian circle packings and related
techniques such as investigating orbits of thin groups, geometric group theory, equidistribution, the
affine sieve, strong approximation and expanders. Hee Oh centered her presentations on the role of
dynamics, concluding the week with several applications of the Howe-Moore theorem on the decay of
matrix coefficients, and appropriate measures. Elena Fuchs focused on arithmetic aspects of circle
packings, and in particular the Fuchs-Sanden conjecture (a major open problem in the field): in any
given integral primitive Apollonian circle packing, all integers (aside from finitely many exceptions) in
allowable residue classes modulo 24 are represented as curvatures in the packing. Her lectures
highlighted the way the combinatorial sieve and expanders can be used to control error terms, and
culminated by bringing these methods together with a new variant of the circle method to prove that a
positive proportion of integers are presented as curvatures in such a packing.
Participants: Participants, lecturers, and organizers came from institutions in 8 countries, and
spanned at least 13 nationalities. The student participants gave high reviews of the summer school,
focusing on the quality and content of the featured lectures, the inclusive atmosphere and also on the
process of writing the expository essays for the handbook. In fact, the majority of the students
commented that the effort of writing the essay and preparing the lecture in advance was a very positive
experience that served them well for understanding the featured lectures during the week, and taught
them new mathematics in depth that they might not otherwise have learnt. The handbook will be a
useful resource as they continue to read further in the field.
The funding from the Clay Mathematics Institute and National Science Foundation was critical in
providing appropriate support of our distinguished lecturers, as well as ensuring that the most
qualified students from all over North America and Western and Eastern Europe could attend this
summer school. Current research on the topic of the summer school has so far primarily been
spearheaded by mathematicians at US institutions, but the enthusiastic response to the summer school
shows that students abroad are also eager to join the field, and we believe that this event has opened
the door to more international participation. In addition, this summer school has solidified the
presence of talented young women in this field.
The ambience of the summer school was significantly enriched by the lovely surroundings of the IML,
including its exhaustive library and collections of journals. In particular, participants were able to
appreciate the house and grounds via the understanding of the history gained during the tour given by
Prof. Laptev. It was a very special experience to be able to gather so many young people in the
environment of such a premier research institute. It inspires young people when they feel the
mathematical community is investing in their success, and a stay at the IML is such a form of
investment. The lecture room was perfectly sized for the distinguished lecture series, providing all
necessary practicalities for the talks as well as an intimate discussion environment. The social
atmosphere at the IML was also perfectly tuned to this type of event. In particular, the provision of
meals by the IML catering staff allowed for all the participants to speak casually with more senior
members (organizers and lecturers). Six of the attending mathematicians are presently at a career
juncture, changing either institution, level of job, or both, and the informal discussions were
particularly useful for these participants.
In short, we are very grateful to the IML for proposing to sponsor this event, for funding the
accommodation of all the participants, and for the extremely gracious hospitality shown to all
participants throughout the week.
28
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Organizing committee
Alina Bucur, University of California, San Diego, Pirita Paajanen, University of Helsinki and Lillian
Pierce, University of Oxford.
Participants
First name Last name
Alina
Bucur
Affiliation
Country
Claire
Burrin
ETH Zürich
Switzerland
Pritha
Chakraborty
Texas Tech University
United States
Sneha
Chaubey
United States
Giacomo
Cherubini
University of Illinois at UrbanaChampaign
University of Copenhagen
AnneMaria
Amy
ErnvallHytönen
Feaver
University of Helsinki
Finland
University of Colorado at Boulder
United States
Yongqi
Feng
University of Amsterdam,
Netherlands
Elena
Fuchs
University of California, Berkeley
United States
Anna
Haensch
Max Planck Institute for Mathematics
Germany
Min
Lee
Brown University
United States
Poj
Lertchoosakul
Poland
Benny
Löffel
IM PAN, Institute of Mathematics of the
Polish Academy of Sciences
ETH Zürich
Beth
Malmskog
Colorado College
United States
Jana
Medkova
Masaryk University
Czech Republic
Hee
Oh
Yale University
United States
Pirita
Paajanen
University of Helsinki
Finland
Wenyu
Pan
Yale University
United States
Lillian
Pierce
Duke University
United States
Anke
Pohl
Georg-August-Universität Göttingen
Germany
University of California, San Diego
United States
Denmark
Switzerland
29
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Damaris
Schindler
Hausdorff Center for Mathematics
Germany
Katherine
Stange
University of Colorado at Boulder
United States
Anitha
Thillaisundaram Heinrich Heine University Düsseldorf
Germany
Xin
Zhang
United States
Stony Brook University
Effective equations in Mathematical Physics, July - Scientific report
The analysis of large quantum systems is a notoriously difficult problem, stemming from the fact that
quantum mechanics is formulated on a Hilbert space which grows with the number of particles. In
some situations, however, simple effective models posed on a fixed space arise in the limit. These are
usually nonlinear.
The conference focused on a mathematically rigorous analysis, both of the derivation and on the
analysis of these effective equations. Both stationary and dynamical properties were investigated and
the organizers are happy that several results at the cutting edge of our understanding were presented.
In addition to discussing known results, the conference emphasized open problems in the field. The
organizers had asked five distinguished researchers in the field to summarize their view of the domain
and to outline important questions for future work in extended special talks.
Those lead to intense discussions, both in large and in small groups, and both between researchers
with a mathematical and with a physical background.
The organizers would like to thank the Mittag-Leffler Institute for the excellent support and for
providing ideal working conditions.
Organizing committee
Rupert Frank, California Institute of Technology, Caltech and Mathieu Lewin, The University
of Cergy-Pontoise.
30
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants
First name
Last name Affiliation
Chen
University of Texas at Austin
Country
Maria J.
Esteban
University of Dauphine
France
Sören
Fournais
Aarhus University, Aarhus C
Denmark
Rupert
Frank
California Institute of Technology, Caltech
United States
Juerg
Fröhlich
ETH Zürich
Switzerland
Patrick
Gérard
Université Paris-Sud
France
Stephen
Gustafson
University of British Columbia
Canada
Christian
Hainzl
Universität Tübingen
Germany
Joachim
Krieger
École polytechnique fédérale de Lausanne
Switzerland
Ari
Laptev
Imperial College London
United Kingdom
Enno
Lenzmann
University of Basel
Switzerland
Mathieu
Lewin
The University of Cergy-Pontoise
France
Elliott H.
Lieb
Princeton University
United States
Michael
Loss
Georgia Institute of Technology
United States
Nam
Institute of Science and Technology Austria
(IST Austria)
KTH Royal Institute of Technology
Austria
Fabian
Phan
Thanh
Portmann
Nicolas
Rougerie
University of Grenoble
France
Julien
Sabin
The University of Cergy-Pontoise
France
Benjamin
Schlein
Thomas
United States
Sweden
University of Bonn
Germany
Israel Michael Sigal
University of Toronto
Canada
Michael
Weinstein
Columbia University
United States
Giorgio
Velo
University of Bologna
Italy
31
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Participants from and in the Nordic Countries
May – July
First name Last name
Country
Giacomo
Cherubini
Denmark
Sören
Fournais
Denmark
Anne-Maria Ernvall-Hytönen
Finland
Pirita
Paajanen
Finland
Jari
Toivanen
Finland
Christer
Bennewitz
Sweden
Tomas
Björk
Sweden
Sunil
Chhita
Sweden
Maurice
Duits
Sweden
Erik
Duse
Sweden
Erik
Ekström
Sweden
Bertil
Gustafsson
Sweden
Adrien
Hardy
Sweden
Henrik
Hult
Sweden
Josef
Höök
Sweden
Kurt
Johansson
Sweden
Rostyslav
Kozhan
Sweden
Pavel
Kurasov
Sweden
Gaultier
Lambert
Sweden
Elisabeth
Larsson
Sweden
Erik
Lindström
Sweden
Annemarie
Luger
Sweden
Per
Lötstedt
Sweden
Anthony
Metcalfe
Sweden
Christoph
Neuner
Sweden
Fabian
Portmann
Sweden
Tobias
Rydén
Sweden
Thomas
Schön
Sweden
Boris
Shapiro
Sweden
Rune
Suhr
Sweden
Johan
Tysk
Sweden
Johan
Walden
Sweden
Lina
von Sydow
Sweden
32
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Publications
Institut Mittag-Leffler publishes two research journals. Acta Mathematica was founded by Gösta
Mittag-Leffler in 1882, while Arkiv för matematik traces its roots back to a journal founded in 1903 by
the Royal Swedish Academy of Sciences.
Since January 1, 2006, Springer is handling printing, subscriptions and distribution of both journals.
Naturally, the Institute retains full ownership and full editorial control of the journals. All back
volumes of both journals have been digitized by Springer and are available on the web for subscribers.
The way in which scientific journals are purchased has changed significantly over the past few years.
The traditional model of subscribing to printed publications is increasingly being replaced by
individually negotiated agreements for online access, including consortia, multi-site licenses, and site
licenses, all referred to as “online deals”. Overall this will lead to a wider exposure, as well as increased
visibility and usage.
Acta Mathematica
2 volumes/year: 4 issues, totally 800 pp during 2014.
During 2014 the issues 212:1-2 and 213:1-2 have appeared with in total 15 articles.
The influx of manuscripts has been very good.
Through our agreement with Springer our subscribers have online access all the way back to the very
first issue of Acta Mathematica, Vol 1, 1882.
According to the latest ranking of the worlds 250 most famous journals in mathematics, Acta
Matematica has the higest impact factor.
Editorial Board
Ari Laptev, Editor-in-Chief, Institut Mittag-Leffler
Michel Brion, Grenoble, France (from November)
Tobias Holck Colding, Massachusetts Institute of Technology, USA
Håkan Eliasson, Université Paris 7, France
Jens Carsten Jantzen, University of Aarhus, Denmark (until June)
Jesper Grodal, Köpenhamn, Denmark (from July)
Kurt Johansson, KTH Royal Institute of Technology, Stockholm, Sweden
Pekka Koskela, University of Jyväskylä, Finland (until June)
John Rognes, University of Oslo, Norway (until June)
Eero Saksman, Helsinki, Finland (from July)
Technical Editors
Anders Björn, Linköping University, Sweden
Federico Incitti, Institut Mittag-Leffler
Editorial Assistant
Karl Jonsson, KTH, Stockholm Sweden
Tommy Ekola, KTH, Stockholm, Sweden
Annika Augustsson, Institut Mittag-Leffler
33
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
Arkiv för matematik
1 volume/year (2 issues, totally 400 pp)
The issues 52:1-2 have appeared during 2014 within total 20 articles.
The influx of manuscripts has been sufficient.
Through our agreement with Springer our subscribers have online access back to the very first issue of
Arkiv för matematik.
Editorial Board
Ari Laptev, Editor-in-Chief, Institut Mittag-Leffler
Tobias Ekholm, Deputy Editor-in-Chief, Institut Mittag-Leffler
Mats Andersson, Chalmers University of Technology, Göteborg
Nils Dencker, Lund University
Carel Faber, KTH Royal Institute of Technology, Stockholm, Sweden
Volodymyr Mazorchuk, Uppsala University
Peter Sjögren, Göteborg University, Sweden
Jeffrey Steif, Chalmers University of Technology, Göteborg, Sweden
Technical Editor
Anders Björn, Linköping University, Sweden
Editorial Assistant
Maria Weiss, Institut Mittag-Leffler
Jenny Wiklund, Institut Mittag-Leffler
Library and historical archive
During 2014 Institut Mittag-Leffler still subscribed mainly to printed journals. In addition to these 110
journals, around 60 more are received in exchange for Acta Mathematica and Arkiv för matematik.
The extensive project of registering books, journals and documents at IML has continued through the
year.
During 2013-2014 the Institute started a project to scan all letters to and from Gösta Mittag-Leffler.
The Archive Trust for Research in Mathematical Sciences and Philosophy in England helped us with
this. Our aim is to publish all material at our home page.
Documents and information from the IML archive are in great
request. This includes the photographs collected by Gösta MittagLeffler. As an example, several photos in the recent, much
appreciated biography of Anne Charlotte Leffler (Gösta MittagLeffler's sister) by Monica Lauritzen came from this collection.
Many guests at IML during the year have got a glimpse of the
history of mathematics from the rich archive for rare books.
Arthur, Gösta, Frits and Anne
Charlotte, the four siblings Leffler.
Photo taken at the end of the 1860s.
The original manuscript which Henri Poincaré submitted in May
1888 for Oscar II's prize competition was recently found, and
through a generous donation by Ulf R. Johansson, Malmö its new
home is at Institut Mittag-Leffler. The Institute now hosts most of
the existing documents and letters around the famous prize.
34
INSTITUT MITTAG-LEFFLER – A NORDIC INSTITUTE FOR RESEARCH IN MATHEMATICS
The board of Institut Mittag-Leffler
Michael Benedicks, KTH Royal Institute of Technology, Stockholm
Bo Berndtsson, Chalmers University of Technology, CTH, Göteborg
Anders Björner, KTH Royal Institute of Technology, Stockholm, Chairman
Nils Dencker, Lund University
Tobias Ekholm, Uppsala University/Institut Mittag-Leffler
Carel Faber, KTH Royal Institute of Technology, Stockholm
Kristian Ranestad, University of Oslo
Kurt Johansson, KTH Royal Institute of Technology, Stockholm
Juha Kinnunen, Aalto University (from July)
Ari Laptev, Institut Mittag-Leffler
Mikael Rørdam, University of Copenhagen
Eero Saksman, University of Helsinki (until June)
Ragnar Sigurdsson, University of Iceland, Reykjavik
Anna-Karin Thornberg, KTH Royal Institute of Technology, Stockholm
The Board in May 2014
Administration
Ari Laptev, Director, 50%
Tobias Ekholm, Deputy Director 20%
Annika Augustsson, Administrative coordinator and economist
Inger Halvarsson, Program administrator
Jenny Wiklund, Program administrator and Editorial Assistant for Arkiv för
Matematik, (until april)
Maria Weiss, Program administrator and Editorial Assistant for Arkiv för
Matematik, from april
Mikael Rågstedt, Librarian, Editorial Assistant, Acta Mathematica
Federico Incitti, Rome, Technical editor of Acta Mathematica, 67%
Alexander Koponen, System administrator 60%
Graeme Pollock, System administrator 60%
Fawzi Mourou, Caretaker
35
1 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
Förvaltaren för Makarna Mittag-Lefflers matematiska stiftelse får härmed avge
årsredovisning för räkenskapsåret 1 januari - 31 december 2014.
Förvaltningsberättelse
Ändamål
Makarna Mittag-Lefflers matematiska stiftelses ändamål är att inom de fyra nordiska länderna, Sverige,
Danmark, Finland och Norge, och alldeles särskilt Sverige, för framtiden uppehålla och ytterligare
utveckla den ställning, vilken den rena matematiken i dessa länder numera intager, samt att härvid
även bereda aktning och rättvist uppskattande utom Nordens gränser för dessa länders insats inom
tankelivets högsta område. Makarna Mittag-Lefflers matematiska stiftelse bedriver verksamhet bl.a.
i form av tidskriftsutgivning varför alla uttag redovisas över resultaträkningen som kostnader för
drift av stiftelsen.
Främjande av ändamålet
Under året har 105 846 kronor använts ur fonden för att driva Institut Mittag-Leffler och utge
tidskrifterna Acta Mathematica och Arkiv för Matematik. Eftersom Makarna Mittag-Lefflers
matematiska stiftelse bedriver verksamhet, och därmed är klassad som näringsdrivande, redovisas
alla uttag som kostnader för drift av stiftelsen.
Nedan framgår stiftelsens egna kapitals förändring de fem senaste åren.
Ingående kapital
Beslutade stip. och anslag
Årets resultat
Utgående kapital
2014
2013
2012
2011
2010
136 382 435
11 062 113
147 444 548
133 501 027
2 881 408
136 382 435
129 490 775
4 010 252
133 501 027
132 288 313
-2 797 538
129 490 775
130 158 115
2 130 198
132 288 313
8,11%
2,16%
3,10%
-2,11%
1,64%
Årlig förändring i %
Stiftelsen har inte haft några anställda och inga löner och ersättningar har utbetalats under året.
Allmänt om samförvaltningen
Kungl. Vetenskapsakademien är förvaltare för Makarna Mittag-Lefflers matematiska stiftelse,
jämte ytterligare 97 stiftelser. Det ekonomiska ansvaret vilar därför på akademistyrelsen som enligt 12 §
akademiens grundregler är ansvarig för vården av akademiens ekonomiska angelägenheter.
Fördelningen av årets avkastning (räntor och utdelningar) och realisationsresultat har gjorts utifrån
varje enskild stiftelses andel av det totala marknadsvärdet på stiftelsernas gemensamma tillgångar vid
årets början. Varje enskild stiftelses andel av det totala egna kapitalet vid årets slut har legat till grund
för fördelning av stiftelsernas totala gemensamma tillgångar. Det egna kapitalet för respektive stiftelse
består av föregående års egna kapital som påförts årets resultat och reducerats med eventuella
beslutade stipendier.
Kapitalförvaltning
Kungl. Vetenskapsakademien (KVA) förvaltar ett kapital om 1 501 mkr som avser anknutna stiftelser.
KVA och dess anknutna stiftelsers kapital (exklusive Stiftelsen Anna-Greta och Holger Crafoords fond)
förvaltas av Nordea enligt de av akademistyrelsen fastställda riktlinjerna enligt fördelningen nedan:
2 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
Tillgångsslag
Min
Normal
Max
Räntebärande värdepapper
10%
20%
30%
Aktier
40%
60%
80%
Alternativa placeringar
10%
20%
30%
Förändring eget kapital (tkr)
Nedan framgår eget kapitals förändring de fem senaste åren.
Ingående kapital
Ny donation
Lämnat driftsanslag
Besl. stip. och anslag
Årets res., kap.förv.
Återf. Nedskr. aktier
Nedskrivning aktier
Res. övrig verksamhet
Utgående kapital
Årlig förändring i %
2014
1 147 811
1 147 811
2013
1 094 483
4 471
-5 743
-18 639
77 282
-4 043
1 147 811
2012
1 068 374
4 500
-7 162
-23 195
28 764
25 929
-2 727
1 094 483
2011
1 094 851
412
-6 348
-20 862
29 871
-25 929
-3 621
1 068 374
2010
1 081 200
902
-6 185
-19 813
41 238
-2 491
1 094 851
0,00%
4,87%
2,44%
-2,42%
1,26%
6,90%
8,10%
-1,10%
0,10%
5,60%
5,80%
Makarna Mittag-Lefflers matematiska stiftelses andel uppgår till 11,99 %.
Portföljavkastning i jämförelse med valt index.
Avkastning 1)
Jämförelseindex
15,29%
13,48%
3,89%
4,02%
1) 2013 avser endast 8 månader då omläggningen till Nordea skedde i maj 2013.
Marknadskommentar
Fjolårets positiva makroekonomiska utropstecken var den amerikanska ekonomins fortsatta
förbättring. Utsikterna om normalisering har medfört en kraftig förstärkning av dollarn.
I Europa har däremot den ekonomiska utvecklingen varit fortsatt skör. Stigande förväntningar
på offensiva penningspolitiska åtgärder från den europeiska centralbanken (ECB) har bidragit
till att försvaga euron, och gett exportindustrin förhoppningar om ett välkommet lyft. ECB
"slog till" på det här årets sida vilket har resulterat i fortsatt tryck uppåt på europeiska aktier
och press neråt på långräntorna. Sverige har haft en motsvarande utveckling. Slutligen
skapade oljans kraftiga prisfall under den andra halvan av fjolåret en stark deflationistisk trend
som fortsätter att dämpa räntor och höja börsvärden trots en gnagande oro kring tillväxt i
världsekonomin och graden av belåning.
2014 var ett starkt år för aktier och i Sverige gav även statsobligationer en hög avkastning.
Stockholmsbörsen (OMX Total Return) steg knappa 14 procent medan svenska statsobligationer, mätt som OMRX, steg med 12,1 procent. Globala aktier mätt i SEK avkastade hela
27,4 procent, medan börserna i tillväxtekonomier avkastade 18,7 procent i SEK. Större delen
av avkastningen mätt i SEK på globala aktier förklaras av försvagningen av den svenska kronan
under året. Kreditmarknaden fortsätter också att utvecklas positivt, till följd av jakten på
placeringsalternativ till statsräntor.
Vad beträffar stiftelsens resultat och ställning i övrigt, hänvisas till efterföljande resultat- och balansräkningar med tillhörande noter.
3 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
RESULTATRÄKNING
Not
Stiftelsen intäkter
Räntor och utdelning
Externa anslag till stiftelsen
Projektanslag
Övriga intäkter
Intäkter tidskrifter
Stiftelsen kostnader
Driftskostnader för stiftelsen
Projektkostnader
Kostnader tidskrifter
Förvaltningskostnader
Av- och nedskrivningar av
materiella anläggningstillgångar
Förvaltningsresultat
Realisationsresultat
Kursvinster
Redovisat årsresultat
1
2
1
3
2014-01-01
2014-12-31
2013-01-012013-12-31
2 512 993
5 796 131
9 381 734
1 258 100
1 613 726
20 562 683
845 524
2 714 726
4 514 704
527 624
934 360
9 536 938
-6 169 698
-9 381 734
-1 549 502
-492 360
-7 084 720
-4 514 704
-1 324 301
-319 420
-406 771
-18 000 065
-554 033
-13 797 178
2 562 618
-4 260 240
8 295 176
204 320
8 499 495
7 141 648
7 141 648
11 062 113
2 881 408
4 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
BALANSRÄKNING
2014-12-31
2013-12-31
4
5
490 416
1 790 465
505 353
1 475 545
6
7
106 936
2 880
2 390 697
83 844
47 536
2 112 278
8
142 262 158
142 262 158
136 540 439
136 540 439
144 652 855
138 652 717
4 328 770
834 234
5 163 004
7 632 525
729 411
8 361 936
3 379 658
416 744
8 542 662
8 778 680
153 195 517
147 431 397
149 073 489
-1 628 941
147 444 548
140 483 400
-4 100 965
136 382 435
147 444 548
136 382 435
372 086
5 378 883
5 750 969
254 885
10 794 077
11 048 962
5 750 969
11 048 962
153 195 517
147 431 397
Ställda säkerheter
Inga
Inga
Ansvarsförbindelser
Inga
Inga
Tillgångar
Anläggningstillgångar
Materiella anläggningstillgångar
Byggnader och mark
Byggnadsinventarier
Inventarier, verktyg och
installationer
Datorer
Finansiella anläggningstillgångar
Finansiella anläggningstillgångar
Summa anläggningstillgångar
Omsättningstillgångar
Övriga fordringar
Förutbet. kostnader och uppl. intäkter
Kassa och bank
Summa omsättningstillgångar
Summa tillgångar
Eget kapital och skulder
Eget kapital
Bundet eget kapital
Fritt eget kapital
Summa Eget kapital
Kortfristiga skulder
Leverantörsskulder
Uppl. kostnader och förutbet. intäkter
Summa skulder
Summa eget kapital och skulder
9
STÄLLDA SÄKERHETER OCH
ANSVARSFÖRBINDELSER
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
NOTER MED REDOVISNINGS-, OCH VÄRDERINGSPRINCIPER
Allmänna redovisningsprinciper
Årsredovisningen är upprättad enligt årsredovisningslagen och Bokföringsnämndens allmänna råd.
Med undantag för fondrabatter (se nedan) är redovisningsprinciperna är oförändrade jämfört med
föregående år.
Värderingsprinciper m.m.
Tillgångar, avsättningar och skulder har värderats till anskaffningsvärden om inget annat anges nedan.
Fordringar
Fordringar har efter individuell värdering upptagits till belopp varmed de beräknas inflyta.
Fordringar och skulder i utländsk valuta
Fordringar och skulder i utländsk valuta har upptagits till det lägsta av anskaffnings- och balansdagens kurs.
Avskrivingsprinciper för anläggningstillgångar
Följande avskrivningstider tillämpas
Materiella anläggningstillgångar
Datorer
Inventarier, verktyg och installationer
Byggnadsinventarier
Byggnader
3 år
5 år
10 år
40 år
Finansiella anläggningstillgångar
Värdering av finansiella anläggningstillgångar sker kollektivt enligt portföljmetoden. Värderingen sker till
anskaffningsvärde, vid bestående nedgång görs nedskrivning till marknadsvärde. Nedskrivningen återförs
vid bestående uppgång.
Fondrabatter
Fondrabatter redovisas enligt skattemässiga principer. Fondrabatten erhålls i form av andelar i respektive
fond och redovisas som intäkt och ökat anskaffningsvärde.
Förvaltningskostnader
Förvaltningskostnader avser kostnader som KVA har för uppfyllande av stiftelsens ändamål såsom kostnader
för ansökningssystem, administrativt stöd och kommittéarbete. Kostnaderna fördelas på respektive anknuten
stiftelse enligt fastställd fördelningsnyckel.
Likvida placeringar
Likvida placeringar värderas i enlighet med årsredovisningslagen till det lägsta av anskaffningsvärdet och
det verkliga värdet.
Eget kapital
Bundet eget kapital består dels av det ursprungliga donationskapitalet, dels av rearesultat som förs direkt
mot bundet eget kapital. Utöver detta ingår även kapitaliseringar, årlig avsättning om 10 % på räntor och
utdelningar. Fritt kapital avser den del av kapitalet som kan disponeras för utdelningar.
Anslag
Beviljade anslag redovisas direkt mot eget kapital. Anslagen skuldförs vid beslutstillfället. Om utfästelsen
är beroende av framtida avkastning bokförs anslagen i den takt villkoren uppfylls. Kostnader för ändamålet
redovisas i resultaträkningen.
Projektredovisning
Externa anslag för projektverksamhet redovisas som intäkt i takt med upparbetade kostnader. Ej utnyttjade
anslag redovisas som skuld.
5 (8)
6 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
Not 1 - Anslagsfinansierade projekt
IB
6 040 005
Erhållet
anslag
3 793 876
Varav
utnyttjat
9 381 734
Kostnad
-9 381 734
UB
452 147
Utgående balans 452 147 kronor redovisas i posten Upplupna kostnader och förutbetalda intäkter.
Not 2 - Övriga intäkter
Hyra mobilmastplats
Stiftelsen Acta Matematica
Fundraising
Fondrabatter
Overheadintäkter
Övriga intäkter
2014-12-31
2013-12-31
183 130
224 000
198 824
436 138
169 854
46 154
1 258 100
0
14 937
256 924
90 254
44 656
406 771
14 937
237 863
251 535
49 698
554 033
Not 3 - Av- och nedskrivningar av
materiella anläggningstillgångar
Byggnader och mark
Byggnadsinventarier
Inventarier, verktyg och installationer
Datorer
Not 4 - Byggnader och mark
Ackumulerade anskaffningsvärden
Vid årets början
Utgående anskaffningsvärde
Ackumulerade avskrivningar enligt plan
Vid årets början
Årets avskrivning enligt plan på anskaffningsvärden
Utgående ack. avskrivningar enligt plan
597 464
597 464
597 464
597 464
-92 111
-14 937
-107 048
-77 174
-14 937
-92 111
Bokfört värde
490 416
505 353
Not 5 - Byggnadsinventarier
Ackumulerade anskaffningsvärden
Vid årets början
Nyanskaffningar
Utgående anskaffningsvärde
Ackumulerade avskrivningar enligt plan
Vid årets början
Årets avskrivning enligt plan på anskaffningsvärden
Utgående ack. avskrivningar enligt plan
2 378 629
571 844
2 950 473
2 378 629
2 378 629
-903 084
-256 924
-1 160 008
-665 221
-237 863
-903 084
Planenligt restvärde vid årets slut
1 790 465
1 475 545
1 272 914
113 346
1 386 260
1 272 914
1 272 914
-1 189 070
-90 254
-1 279 324
-937 535
-251 535
-1 189 070
106 936
83 844
Not 6 - Inventarier, verktyg och installationer
Ackumulerade anskaffningsvärden
Vid årets början
Nyanskaffningar
Utgående anskaffningsvärde
Ackumulerade avskrivningar enligt plan
Vid årets början
Årets avskrivning enligt plan på anskaffningsvärden
Utgående ack. avskrivningar enligt plan
Planenligt restvärde vid årets slut
7 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
Not 7 - Datorer
Ackumulerade anskaffningsvärden
Vid årets början
Utgående anskaffningsvärde
Ackumulerade avskrivningar enligt plan
Vid årets början
Årets avskrivning enligt plan på anskaffningsvärden
Utgående ack. avskrivningar enligt plan
Planenligt restvärde vid årets slut
2014-12-31
2013-12-31
149 093
149 093
149 093
149 093
-101 557
-44 656
-146 213
-51 859
-49 698
-101 557
2 880
47 536
Not 8 - Finansiella Anläggningstillgångar (tkr)
Bokförda värden och marknadsvärden på stiftelsens placeringar har fastställts med hjälp av fördelningsnyckel
beräknad på de totala samförvaltade kapitalet. Nedan redovisas totalt samförvaltat kapital.
Akademifonden (tkr)
Ackumulerade anskaffningsvärden
Vid årets början
Försäljning
Utgående anskaffningsvärden
2014-12-31
2013-12-31
0
0
1 119 736
-1 119 736
0
Bokfört värde
0
0
Marknadsvärde
0
0
664 559
390 501
-261 205
793 855
0
784 880
-120 321
664 559
Bokfört värde
793 855
664 559
Marknadsvärde
927 886
713 545
365 662
78 472
-206 579
237 555
0
814 194
-448 532
365 662
Bokfört värde
237 555
365 662
Marknadsvärde
242 959
365 699
Alternativa investeringar (tkr)
Ackumulerade anskaffningsvärden
Vid årets början
Köp
Utgående anskaffningsvärden
118 920
36 023
154 943
0
118 920
118 920
Bokfört värde
154 943
118 920
Marknadsvärde
156 197
119 469
Aktier och andelar (tkr)
Ackumulerade anskaffningsvärden
Vid årets början
Köp
Försäljning
Utgående anskaffningsvärden
Räntebärande (tkr)
Ackumulerade anskaffningsvärden
Vid årets början
Köp
Försäljning
Utgående anskaffningsvärden
8 (8)
MAKARNA MITTAG-LEFFLERS MATEMATISKA STIFTELSE
Org.nr 802408-0890
Totalt samförvaltat kapital (tkr)
Bokfört värde
2014
1 186 353
2013
1 149 141
2012
1 119 736
2011
1 099 746
2010
1 125 585
Marknadsvärde
1 327 042
1 198 713
1 134 209
1 099 746
1 146 990
10,71%
5,69%
3,13%
-4,12%
3,09%
Årlig förändring %
Makarna Mittag-Lefflers matematiska stiftelses andel uppgår till 11,99 %.
Nedan redovisas stiftelsens andel av bokfört värde i respektive tillgångsslag.
Finansiella anläggningstillgångar (kr)
Aktier och andelar
Räntebärande
Alternativa investeringar
2014-12-31
2013-12-31
95 195 622
28 486 487
18 580 049
142 262 158
78 962 655
43 447 816
14 129 968
136 540 439
Not 9 - Eget kapital
Belopp vid årets ingång
Årets resultat
Omföring till/från bundet eget kapital
- avsättning enl. stadgarna
- realisationsresultat och
kursvinst/förlust
Belopp vid årets utgång
Summa eget kapital kapital 14-12-31
Stockholm den 28 maj 2015
Staffan Normark
Ständig sekreterare
Min revisionsberättelse har avgivits den
Magnus Prööm
Auktoriserad revisor
Bundet eget kapital
Stiftelsekap.
697 880
697 880
Övrigt
139 785 520
Fritt
eget kapital
-4 100 965
11 062 113
294 913
-294 913
8 295 176
148 375 609
-8 295 176
-1 628 941
147 444 548