Séminaire Laurent Schwartz — EDP et applications

==================================================================

IHES Covid-19 regulations:

– all the participants who will attend the event in person will have to keep their mask on in indoor spaces
and where the social distancing is not possible;
– speakers will be free to wear their mask or not at the moment of their talk if they feel more comfortable
without it;
– Up to 25 persons in the conference room, every participant will be asked to be able to provide a health pass
– Over 25 persons in the conference room, every participant will be asked to provide a health pass which will
be checked at the entrance of the conference room.

==================================================================

Séminaire Laurent Schwartz — EDP et applications

==================================================================

IHES Covid-19 regulations:

– all the participants who will attend the event in person will have to keep their mask on in indoor spaces
and where the social distancing is not possible;
– speakers will be free to wear their mask or not at the moment of their talk if they feel more comfortable
without it;
– Up to 25 persons in the conference room, every participant will be asked to be able to provide a health pass
– Over 25 persons in the conference room, every participant will be asked to provide a health pass which will
be checked at the entrance of the conference room.

==================================================================

2022 IHES SUMMER SCHOOL

REMINDER: the participants of the Summer School who will come in person have been selected among a lot of applicants. Others, who were not selected but put on a waiting list won’t participate in person because the capacity of the conference center has been reached.

Therefore, if you are interested in participating but did not apply or haven’t been selected or invited to come, please register to participate through Zoom and don’t come to IHES. There are no more seats available and those who did apply and were selected through the application process have the priority to participate in person.

Thank you for your understanding and cooperation!

************

Organizing Committee: Pierre-Henri Chaudouard (IMJ-PRG),  Wee Teck Gan (National Univ. of Singapore), Tasho Kaletha (Univ. of Michigan), Yiannis Sakellaridis (Johns Hopkins Univ.)

Scientific Committee: Gérard Laumon (Univ. Paris-Sud), Colette Mœglin (IMJ-PRG), Bảo Châu NGÔ (Chicago Univ.), Jean-Loup Waldspurger (IMJ-PRG)

The « Summer School on the Langlands Program » will be held at the Institut des Hautes Etudes Scientifiques (IHES) from 11 to 29 July. IHES is located in Bures-sur-Yvette, south of Paris (40 minutes by train from Paris).

This school is open to everybody but intended primarily for young participants, including Ph.D. students and postdoctoral fellows.

It has been almost 45 years since the influential summer school held in Corvallis, Oregon in 1977 brought together the leading experts of the Langlands program and defined the research agenda in this area for subsequent decades, at the same time inspiring and enabling several generations of young researchers to join in this exciting journey. This 3-week IHES summer school aims to do the same for the next phase of development in the Langlands program.

Recent decades have brought tremendous progress on the project of endoscopy, the extension of the Langlands program to the “relative” setting of spherical varieties and other related spaces, numerous successful “explicit” methods (such as the theta correspondence) to construct functoriality, novel ideas “beyond endoscopy”, and arithmetic applications of both the theta correspondence and the relative trace formula to the study of special cycles and their generating series. Ideas from the geometric Langlands program have begun impacting and enriching the classical Langlands program in significant ways. In particular, the idea that the “space of Langlands parameters” is not just a set, but a (putative) geometric space, can be used to organize a lot of developments around reciprocity, including the Taylor–Wiles method, derived structures, the Langlands correspondence over function fields, and the geometrization of the local Langlands conjecture.

The summer school will attempt to bring these exciting new directions together and explore their interactions.

SPEAKERS:

BEN-ZVI David (UT Austin)
BEUZART-PLESSIS Raphaël (Univ. Aix-Marseille)
CARAIANI Ana (Imperial College)
CHAUDOUARD Pierre-Henri (IMJ-PRG)
DAT Jean-François (IMJ-PRG)
EMERTON Matthew (Chicago Univ.)
FARGUES Laurent (IMJ-PRG)
FENG Tony (MIT)
FINTZEN Jessica (Duke Univ. & Cambridge Univ.)
GAN Wee Teck (National Univ. of Singapore)
GEE Toby (Imperial College)
HARRIS Michael (Columbia Univ.)
HELLMANN Eugen (Univ. Münster)
KALETHA Tasho (Univ. of Michigan)
LAPID Erez (Weizmann Inst.)
LI Chao (Columbia Univ.)
MASON-BROWN Lucas (Univ. of Oxford)
MOREL Sophie (ENS Lyon)
NGÔ Bảo Châu (Chicago Univ.)
PRASAD Dipendra (IIT Bombay)
RASKIN Sam (Univ. of Texas)
SAKELLARIDIS Yiannis (Johns Hopkins Univ.)
SCHOLZE Peter (Univ. Bonn)
SHIN Sug Woo  (UC Berkeley)
TAÏBI Olivier (ENS Lyon)
VENKATESH Akshay (IAS)
WEINSTEIN Jared (Boston Univ.)
XUE Cong (IMJ-PRG)
YUN Zhiwei (MIT)
ZHANG Wei (MIT)
ZHU Xinwen (CALTECH)
 

This is an IHES Summer School, organized in partnership with the Clay Mathematical Institute, the National Science Foundation, the support of the Société Générale, the FMJH and Qube RT.

 

The aim of this workshop is to bring together mathematicians and computer scientists around some talks on recent results from statistics, machine learning and more generally data science research. Various topics in machine learning, optimization, deep learning, optimal transport, inverse problems, statistics and problems of scientific reproducibility will be presented.

Registration is free and open to February 2, 2021.

Organised by: Thanh Mai PHAM NGOC (LMO) and Charles SOUSSEN (L2S)

Note: The conference will be held entirely on video-conference.

Invited speakers:

Guillaume Charpiat (LRI)
Lenaïc Chizat (LMO)
Emilie Chouzenoux (CVN)
Agnès Desolneux (Centre Borelli)
Gaël Richard (Télécom Paris)
Gaël Varoquaux (INRIA Parietal)

Combinatorics and Arithmetic for Physics: special days

The meeting’s focus is on questions of discrete mathematics and number theory with an emphasis on computability. Problems are drawn mainly from theoretical physics (renormalisation, combinatorial physics, geometry, evolution equations, noncommutative differential equations) or related to its models, but not only.

Computation, based on combinatorial structures (graphs,trees, words, automata, semirings, bases) or classic structures (operators, Hopf algebras, evolution equations, special functions, categories) are good candidates for computer-based implementation and experimentation. »

Organised by : Gérard H.E. Duchamp, Maxim Kontsevich, Gleb Koshevoy et Vincel Hoang Ngoc Minh

The conference will be held in a blended form, with talks given on site at IHES and others remotely through Zoom.

All the talks may be followed either online or on site.

Covid-19 regulations: for those who will attend in person, masks will be mandatory and we will ask them to provide a health pass upon their arrival.

Sponsors:

GDR Renorm

LIPN et FR Math-STIC (Univ-Paris 13)

—————————————– IMPORTANT INFORMATION ——————————————

Because of the current pandemic, we do not know exactly what form the conference will take. Two options are currently possible
– a fully online event.
– an hybrid event. In this configuration the conference will take place at the IHES, France. All the talks will be broadcast online

———————————————————————————————————————-

A 3-day conference on recent developments in the geometry of groups with hyperbolic features, Kähler geometry, and their interactions. This event is also be the occasion to celebrate the 60th birthday of Thomas Delzant, whose contributions to these fields have had a large influence in the development of geometric group theory and the study of Kähler groups using hyperbolic techniques.

Updated information can be found on the web page of the conference

Organised by : Rémi Coulon, François Dahmani and Alexandre Martin

Confirmed speakers :
Goulnara Arzhantseva
Martin Bridson
Serge Cantat
Cornelia Drutu
Misha Gromov
Vincent Guirardel
Panagiotis Papasoglu
Pierre Py
Zlil Sela

 

 

A conference in honor of Thibault Damour

The conference will be held in a blended form, with talks given on site at IHES and others remotely through Zoom.

All the talks may be followed either online or on site (subject to availability).

Covid-19 regulations: for those who will attend in person, masks will be mandatory and we will ask them to provide a health pass upon their arrival.

Organized by Nathalie Deruelle (APC, Université de Paris), Alessandro Nagar (INFN Torino), and Slava Rychkov (IHES), the « Damour Fest: Adventures in Gravitation » will be held from October 12 to 15, 2021 at IHES.

 

Professor Thibault Damour is a permanent professor at IHES since 1989.
He is a theoretical physicist specializing in general relativity and string theory. He is known worldwide for his innovative work on black holes, gravitational waves, and quantum cosmology. Throughout his career, he has received numerous international awards, such as the prestigious Einstein Medal and the CNRS Gold Medal, and more recently (in 2021) the Galileo Galilei Medal, the ICTP Dirac medal, and the Balzan Prize. 

 

Invited speakers:

Leor Barack, University of Southampton
Sebastiano Bernuzzi, University of Jena
Lydia Bieri, Michigan University
Luc Blanchet, IAP, Paris
Alessandra Buonanno, AEI, MPI, Potsdam
Sophie De Buyl, Vrije Universiteit Brussel
Stanley Deser, Brandeis University
Marc Henneaux, Collège de France & ULB Bruxelles
Bala Iyer, ICTS, TIFR, Bangalore 
Piotr Jaranowski, University of Białystok
Sergiu Klainerman, Princeton University
Michael Kramer, MPI, Bonn
Juan Maldacena, IAS, Princeton
Viatcheslav Mukhanov, Ludwig Maximilian University, Munich
Hermann Nicolai, AEI, MPI, Potsdam
Adam Pound, University of Southampton
Giuseppe Policastro, ENS Paris
Alexander Polyakov, Princeton University
Manuel Rodrigues, ONERA, Université Paris-Saclay
Remo Ruffini, ICRA, Rome
David Shoemaker, MIT
Sergey Solodukhin, University of Tours
Alexei Starobinski, Landau Institute, Moscow
Gabriele Veneziano, CERN & Collège de France
Alex Vilenkin, Tufts University
Edward Witten, IAS, Princeton

.

****************************************************

The conference will be held at IHES depending on the evolution of health situations and related restrictions.

****************************************************

 

 

The conference “Large-scale Limits of Interacting Particle Systems”, organized by Mitia Duerinckx (CNRS), Sergio Simonella (CNRS), and Raphael Winter (École Normale Supérieure de Lyon), with the support of the CNRS-Momentum program, will take place from October 4 to 8 2021 and simultaneously on Zoom.

These five days will bring together researchers interested in rigorous methods for the study of scaling limits of interacting particle systems.

Mini-courses:

Mathieu Lewin (CNRS): “Mean-field Limits and Bose-Einstein Condensation for Quantum Gases“;
Laure Saint-Raymond (IHES): “Statistical Description of a Hard Sphere Gas Dynamics“;
Manfred Salmhofer (Institute for Theoretical Physics, Univ. of Heidelberg): “Diagrammatic Expansions and Renormalization in Quantum Dynamics”

Invited speakers:

Serena Cenatiempo (GSSI),
Charles Collot (Cergy Paris Université),
Sabine Jansen (LMU),
Jens Marklof (University of Bristol),
Alessia Nota (Università degli Studi dell’Aquila),
Peter Pickl (University of Munich),
Marcello Porta (SISSA),
Mario Pulvirenti (Università di Roma « La Sapienza »),
Nicolas Rougerie (UMPA),
Florian Theil (University of Warwick),
Bálint Tóth (University of Bristol).

Dedicated web page.

Leçons Hadamard
"Nilsequences"
par le Professeur Ben Green

Résumé :

Classical Fourier analysis has found many uses in additive number theory. However, while it is well-adapted to some pro – blems, it is unable to handle others. For example, if one has a set A, and one wishes to know how many 3-term arithmetic progressions are contained in A, then Fourier analysis is useful, but if one wishes to count 4-term progressions then it is not. For this, and other, problems the more general notion of a nilsequence is required. NIlsequences are a kind of «higher order character» forming the basis of what is becoming known as «higher-order Fourier analysis». The talks will be about this theory.

The concept of topos was introduced by A. Grothendieck during his Séminaire de Géométrie Algébrique du Bois-Marie, which took place at the IHES in the early sixties. The original motivation was that of defining a general notion of space on which one could define cohomological invariants in the algebro-geometric setting needed for proving the Weil's conjectures. In spite of this quite specific technical motivation, the notion of topos appeared at the very beginning as defining a new conception of space, capable of unifying the continuous and the discrete in an harmonious marriage: in the words of Grothendieck "Un lit si vaste en effet (telle une vaste et paisible rivière très profonde…), que “tous les chevaux du roi y pourraient boire ensemble…". "
 
In the following years, new perspectives on the notion on topos emerged. According to Lawvere and Tierney, a topos can be considered not only as a generalized space but as a mathematical universe within which one can carry out most familiar set-theoretic constructions, but which also, thanks to the inherent ‘flexibility' of the notion of topos, can be profitably exploited to construct 'new mathematical worlds' having particular properties. On the other hand, the theory of classifying toposes allows to regard a Grothendieck topos as a suitable kind of first-order theory modulo Morita-equivalence. Toposes have also been proved effective in studying dualities and establishing ‘bridges’ across different mathematical theories with a related semantic content.  
 
The conference aims to illustrate the fruitfulness and wide-ranging impact of the notion of topos, by featuring presentations on new theoretical advances in the subject (including the theory of higher toposes) as well as on applications of toposes in different fields such as number theory, algebraic geometry, logic, functional analysis, topology, mathematical physics and computer science. The conference is preceded by a two-day introductory mini-course for the benefit of students and mathematicians who are not already familiar with topos theory.

Scientific committee : O. CARAMELLO*, P. CARTIER, A. CONNES, S. DUGOWSON, A. KHELIF

23-24 November : Tutorials by: Olivia CARAMELLO and André JOYAL

25-27 November : Invited speakers :

Mathieu ANEL (University Paris-Diderot)
Luca BARBIERI-VIALE (Università degli Studi di Milano)
Jean BÉNABOU (University Paris 13)
Caterina CONSANI (Johns Hopkins University, Baltimore)
Thierry COQUAND (University of Göteborg)
Simon HENRY (Radboud University, Nijmegen)
André JOYAL (Université du Quebec, Montréal)
Mike PREST (University of Manchester)
Urs SCHREIBER (Eduard Čech Institute for Algebra, Geometry and Physics, Prague)
Carlos SIMPSON (University of Nice-Sophia-Antipolis) 
Michel VAQUIÉ (University Paul Sabatier, Toulouse)

25 & 27 November: Short Communications Speakers

Ingo BLECHSCHMIDT (University of Augsburg)
Matias DATA (Universidad de Buenos Aires)
Jonas FREY (Copenhagen University)
Camell KACHOUR
Guilherme Frederico LIMA de CARVALHO e SILVA (University of Cambridge)
Pietro POLESELLO (Universita di Padova)
David ROBERTS (University of Adelaide)
Anna Carla RUSSO (University of Salerno & Université Paris-Diderot)
Alex SIMPSON (University of Ljubljana)
Zoran  SKODA (University of Hradec Kralové)
Christopher TOWNSEND (Royal Bank of Canada)

* holder of a fellowship "L'Oréal-Unesco for Women in Science" which supports the conference
 

The non-official website of the conference  ­(maintained by S. Dugowson)
contains further materials provided by the speakers
­in connection with their talks and edited versions of the videos of the tutorials.

List of speakers includes:

      Thomas ALAZARD (ENS Paris)
      Valeria BANICA (Université d'Evry Val d'Essonne)
      Diego CORDOBA (ICMAT)
      Mihalis DAFERMOS (University of Cambridge)
      Camillo DE LELLIS (Universität Zürich)
      Benjamin DODSON (Johns Hopkins University)
      Patrick GERARD (Université Paris-Sud)
      Pierre GERMAIN (Courant Institute of Mathematics)
      Cécile HUNEAU (ENS Paris)
      Alexandre IONESCU (Princeton University)
      Robert JERRARD (University of Toronto)
      Thomas KAPPELER (Universität Zürich)
      Rowan KILLIP (UC Los Angeles)
      Michal KOWALCZYK (Universidad de Chile)
      David LANNES (Université de Bordeaux 1)
      Andrew LAWRIE (University of California, Berkeley)
      Enno LENZMANN (Universität Basel)
      Andrea NAHMOD (University of Massachusetts, Amherst)
      Fabio PUSATERI (Princeton University)
      Benjamin SCHLEIN (Universität Zürich)
      Christopher SOGGE (Johns Hopkins University)
      Vlad VICOL (Princeton University)
      Hatem ZAAG (Université Paris 13)

Organising Committee:

      Thomas DUYCKAERTS (Université Paris 13)
      Frank MERLE (Université de Cergy-Pontoise & IHÉS)
      Jérémie SZEFTEL (Université Pierre et Marie Curie)

Crédit photographique: © CNRS Photothèque
RAJAU Benoît (UMR7538 – Laboratoire de physique des lasers (LPL), VILLETANEUSE et VRIGNAUD François (UMR6172 – XLIM – LIMOGES)

With the support of

 

SÉMINAIRE GROTHENDIECK

Organisé par : L. Barbieri-Viale, F. Brown, D. Gaitsgory et L. Lafforgue 

Conférenciers :

Yves André (Institut de mathématiques de Jussieu)
Joseph Ayoub (Universität Zürich)
Michael Hopkins (Harvard University)
Moritz Kerz (Universität Regensburg) 

Exposé extra-mathématique :

Céline Pessis (coordinatrice du livre "Survivre et vivre. Critique de la science, naissance de l'écologie")

Présentation et projection d’un film :

"L'espace d'un homme" par  Hervé Nisic