• Workshop - Mathematical problems in kinetic theory
May 26, 2015 to May 29, 2015

# News:

### You can find useful informations in the updated "Practical information" page.

Rennes, from May 26th to May 29th

Organization board: Anaïs Crestetto, Mohammed Lemou, Florian Méhats

Kinetic theory is an important field of research that focuses the efforts of re-known international groups coming from various scientific communities. Signifiant advances has been achieved in the last decades, covering mathematical, computational and modeling aspects, but many challenging problems still remain unsolved in this area. Application fields of kinetic theory are numerous: gases dynamics, plasmas and fusion problems, astrophysics and celestial dynamics, population dynamics, biology and cellular activity, socioeconomics and finance, etc. From the modeling point of view, the kinetic models can be thought as intermediate descriptions between fluid models (often insufficient) and particles models (too costly for a practical use). Kinetic systems are in general described by a distribution function depending on time and space but also on additional variables (velocity, character, size, etc). Most of the known kinetic models are given by equations of Boltzmann type, that may be coupled to Maxwell equations. The complexity of these models and the diversity of their structures provide a huge and extremely rich area of research for mathematical analysis, modeling and numerical simulation.

This workshop aims to present recent developments of mathematical research on the understanding of kinetic models. It will be an opportunity to bring together internationally re-known researchers and young researchers in this domain, in order to exchange the different point of views and to promote the emergence of innovative ideas.

Several questions will be investigated, including: large time behavior of kinetic equations, formal and rigorous links with N-particles systems, the development of numerical strategies that are suitable for computer simulations, as well as important modeling aspects in various application fields. Open problems will be discussed as well as new applications and research directions.

### Speakers

Marc Briant (Brown University)
Kleber Carrapatoso (ENS Cachan)
Frédérique Charles (Université Pierre et Marie Curie, Paris 6)
Young-Pil Choi (Imperial College London)
Esther Daus (Vienna University of Technology)
Pierre Degond (Imperial College London)
Laurent Desvilllettes (ENS Cachan)
Amit Einav (University of Cambridge)
Irene M. Gamba (University of Texas at Austin)
François Golse (Ecole Polytechnique)
Thierry Goudon (INRIA Sophia-Antipolis)
Maxime Hauray (Université d'Aix-Marseille)
Slim Ibrahim (University of Victoria)
Pierre-Emmanuel Jabin (University of Maryland)
Antoine Mellet (University of Maryland)
Sara Merino Aceituno (University of Cambridge)
Evelyne Miot (Université Paris-Sud 11)
Stéphane Mischler (Université Paris-Dauphine)
Sébastien Motsch (Arizona State University)
Benoît Perthame (Université Pierre et Marie Curie, Paris 6)
Thomas Rey (Université Lille 1)
Samir Salem (Aix-Marseille Université)
Maja Taskovic (The University of Texas at Austin)

• Meeting - Journées EDP
Jun 1, 2015 to Jun 5, 2015

Roscoff, from June 1st to June 5th

Organization board: Jean-François Coulombel, Frédéric Rousset

Scientific board: Nalini Anantharaman, Dario Bambusi, Nicolas Burq, Piero D’Ancona, Nils Dencker, Isabelle Gallagher, David Lannes, Gilles Lebeau, Laure Saint-Raymond, Luis Vega

The Journées EDP were created in the seventies and have been organized every year since. They have taken place in Saint-Jean-de-Monts, Forges-Les- Eaux, Evian and Biarritz before being currently organized in Roscoff. The topic of the conference is analysis of partial differential equations in a very broad sense: theoretical progress in PDE theory, interactions with other mathematical fields (probability, harmonic analysis, Riemannian geometry...), and interactions with other sciences (fluid mechanics, quantum mechanics, optics, acoustics, biology...).

The conference consists of one mini-course on recent deep results in the field of partial differential equations, and of a series of talks given both by world leading experts and young researchers.

The proceedings of the previous Journées EDP are freely available online on the CEDRAM website.

Registration is now closed. The scientific program will start on Monday June 1st at around 4pm and end on Friday June 5th at noon.

## Program

### Mini-course (6 hours)

László Székelyhidi (University of Leipzig)

The $h$-principle in fluid dynamics: non-uniqueness and anomalous dissipation

### Speakers

Diogo Arsenio (CNRS & University Paris Diderot)
Anne-Laure Dalibard (University Pierre and Marie Curie)
Cécile Huneau (École Normale Supérieure)
Herbert Koch (University of Bonn)
Renato Luca (Instituto de Ciencias Matematicas)
Rafe Mazzeo (Stanford University)
Jean-Marie Mirebeau (CNRS & University Paris Dauphine)
José Luis Rodrigo (University of Warwick)
Luis Miguel Rodrigues (University Lyon 1)
Christopher Sogge (Johns Hopkins University)
Henrik Ueberschär (University Lille 1)
Mark Williams (University of North Carolina)

• Summer schools - Gravity driven flows and environmental risks
Jun 1, 2015 to Jun 4, 2015

Piriac-sur-Mer, from June 1st to June 4th

Organization board: Christophe Berthon, Benjamin Boutin, Anaïs Crestetto, Carine Lucas, Hélène Mathis

Scientific board: Christophe Ancey, François Bouchut, Frédéric Coquel, Stéphane Cordier, Josselin Garnier, Sebastian Noelle, Randall J. LeVeque, Carlos Pares, Jacques Sainte-Marie, Stéphane Zaleski

The prevention of natural risks, the management of water resources and the impact of flows on structures and grounds are essential socio-economics questions nowadays. The modeling and the development of reliable and efficient numerical methods is mandatory to understand such problems. The interdisciplinary GdR EGRIN aims to gather researchers around these topics in order to enforce collaborations.

This meeting is the third EGRIN school. Informations about the GdR and previous editions are available here.

### Mini-courses

David GÉRARD-VARET, Université Paris Diderot, ANALYSIS OF ROUGH BOUNDARIES EFFECTS IN FLUID MECHANICS

Nicolas MANGOLD, CNRS & Université de Nantes, GRAVITY DRIVEN FLOWS ON PLANETS: PROCESS DIVERSITY AND FORMATION CONDITIONS

Pierre SARAMITO, CNRS & Université de Grenoble, NUMERICAL ALGORITHMS IN VISCOPLASTIC FLUIDS: FROM 3D TO THIN LAYERS

### Speakers

A call for contributions will be launched in March 2015.

• H-principle Houat 2015 Workshop
Jun 15, 2015 to Jun 19, 2015

A workshop will be held from Mon. June 15th. to Fri. June 19th, 2015, in the island of Houat, Brittany, France. The workshop is devoted to classical and recent developments in Gromov's h-principle, especially for the construction of geometric structures on manifolds. It intends to allow young searchers and students in the domain to meet with confirmed searchers.

Speakers: Strom Borman (IAS Princeton), Jonathan Bowden (Ludwig-Maximillians U, Munich), Roger Casals (ICMAT Madrid), Yasha Eliashberg (U Stanford), Emmanuel Giroux (ENS Lyon), Guogang Liu (U Nantes), Emmy Murphy (MIT), Klaus Niederkrüger (U Toulouse 3), Emmanuel Opshtein (U Strasbourg), Francisco Presas (ICMAT Madrid), Jasna Prezelj (U Koper), Thomas Vogel (Ludwig-Maximillians U, Munich)

Organizing & scientific committee: Vincent Colin (U Nantes), Gaël Meigniez (U Bretagne Sud).
Web page of the workshop: http://web.univ-ubs.fr/lmam/meigniez/houat_2015/index.html

• Mini-cours "Classical and quantum integrable systems"
Jun 18, 2015 to Jun 19, 2015

This is a 3 hour minicourse outlining recent developments on the symplectic geometry and spectral theory of finite dimensional integrable Hamiltonian systems. There will be an emphasis on the so called toric and semitoric integrable systems.

Ce mini-cours aura lieu en deux séances, salle 004 (Bat. 22-23 du campus de Beaulieu) - Jeudi 18 juin, 16h-17h30 - Vendredi 19 juin, 10h-11h30

• Summer schools - Normal forms and large time behavior for nonlinear PDE
Jun 22, 2015 to Jul 3, 2015

### Place and period

This summer school will take place at the Faculté des Sciences et Techniques, Université de Nantes, from June, 22nd to July, 3rd, 2015. The organization committee is the following : Erwan Faou, Benoît Grébert, Eric Paturel

### Presentation of the field

If normal forms were initially used in a finite dimensional setting, for a better understanding of the long time behavior of dynamical systems, their extension to partial differential equations, especially in the nonlinear case, have led to important progresses during this last decade. More than useful tools, they put in light some characteristic phenomena in complex situations where nonlinearity play a fondamental rôle. The aim of this summer school is to show their great adaptability in various fields (Hamiltonian PDEs, fluid mechanics, numerical analysis), and to explain how it works, in a manner accessible to starting researchers.

### Financial support

Since our summer school is largely devoted to young researchers, we will provide a important number of financial supports. If you asked for a financial support, normally the answer has been sent to you. This support concerns the accomodation during the Summer School (from Sunday evening, June 21st) and the meals (from Monday to Friday, for the two weeks).

### Courses

• Dario Bambusi (University of Milan)
• Hakan Eliasson (University Paris 7)
• Isabelle Gallagher (University Paris-Diderot)
• Pierre Raphaël (University of Nice)
• Nikolay Tzvetkov (University of Cergy-Pontoise)
• Luis Vega (Bilbao University)

These lectures take place during all 2 weeks!

### Conferences

• Massimiliano Berti (SISSA Trieste)
• Rémi Carles (CNRS - University of Montpellier)
• Thomas Duyckaerts (Paris 13 University)
• Patrick Gérard (University Paris-Sud)
• Zaher Hani (Georgia Institute of Technology)
• Thomas Kappeler (University of Zürich)
• Evelyne Miot (Ecole Polytechnique)
• Tadahiro Oh (University of Edinburgh)
• Michela Procesi (University Rome - La Sapienza)
• Frédéric Rousset (University Paris-Sud)
• Nicolà Visciglia (University of Pisa)
• Xiaoping Yuan (Fudan University)
• Workshop - Multiscale numerical methods for differential equations
Aug 25, 2015 to Aug 27, 2015

Rennes, from August 25th to August 27th

Organization board: Benjamin Boutin, Philippe Chartier, Nicolas Crouseilles

Many mathematical models are concerned with physical phenomena occuring at various scales. An efficient numerical solution of such problems requires a specific approach : the severe constraint implied by the smallest scale present in the system would otherwise lead to a prohibitive computational cost. This type of problems appears in various applications such as plasma fusion, multi-fluids flows, or phases transitions.

The mathematical analysis of these methods and of their extension to similar situations represent a very active domain of research nowadays.

In particular, an important challenge consists in mimicking at the discrete level certain inherent qualitative properties of the continuous model, such as the preservation of invariants for instance, or the symplecticity of the system. In this spirit, numerous works have been successly undertaken within the framework of Ordinary Differential Equations (ODEs) and have led to the development of efficient numerical techniques. However, their extension to Partial Differential Equations (PDEs) remains incomplete. One of the main objective of this workshop is thus to facilitate the emergence of new ideas and synergies at the frontier of two domains (ODEs and PDEs).

### Speakers

Assyr Abdulle (EPFL)
Alina Chertock (North Carolina State University)
Francis Filbet (Université de Lyon I)
Martin Gander (Université de Genève)
Ludwig Gauckler (TU Berlin)
Ernst Hairer (Université de Genève)
Shi Jin (University of Wisconsin)
Pauline Lafitte (Ecole Centrale, Paris)
Siddhartha Mishra (ETH Zürich)
Siegfried Müller (Aachen University)
Alexander Ostermann (University of Innsbruck)