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, fairness, statistics will be presented. This workshop is particularly intended for doctoral and post-doctoral researchers.
 
Registration is free and open until March 27, 2026.
Invited speakers:Richard Combes (CentraleSupéléc)Hugo Cui (CNRS, Paris-Saclay)Ekhine Irurozki (Télécom Paris)Anna Korba (ENSAE)Paul Mangold (École polytechnique)Tabea Rebafka (AgroParisTech)
Organizers: Avetik Karagulyan (CNRS) & Erwan Le Pennec (École polytechnique)

French-Japanese Conference on Arithmetic Geometry in Honor of Takeshi Saito and Takeshi Tsuji        May 31 – June 4, 2027 at IHES – Marilyn and James Simons Conference Center    How to get to IHES

This conference, which is part of a long-standing tradition of French-Japanese collaboration in arithmetic geometry, will honor two leading figures of this partnership: Professor Takeshi Saito, on the occasion of his retirement, and Professor Takeshi Tsuji, on the occasion of his 60th birthday.
The main topics of the conference will include:

p-adic Hodge theory, including the p-adic Simpson correspondence, geometric Sen theory, p-adic Galois representations and (φ,Γ)-modules, prismatic cohomology, and their applications;

Ramification theory, including singular support and characteristic cycles of l-adic étale sheaves (in equal and mixed characteristic), compatibility with proper higher direct images, Swan conductors, and epsilon-factors;

Geometric Langlands theory, l-adic, p-adic, and for modules with integrable connections, in characteristic p and in characteristic 0.

 
Invited speakers:

Abhinandan (Sorbonne Université)
Tomoyuki Abe (IPMU, University of Tokyo)
Piotr Achinger (IMPAN & KSE)
Alexander Beilinson (University of Chicago)
Bhargav Bhatt (IAS & Princeton University)*
Ofer Gabber (CNRS & IHES)
David Hansen (National University of Singapore)
Tongmu He (Princeton University)
Haoyu Hu (Nanjing University)
Kazuhiro Ito (Tohoku University)
Hiroki Kato (IHES)
Kazuya Kato (University of Chicago)
Tong Liu (Purdue University)
Kojiro Matsumoto (University of Tokyo)
Yoichi Mieda (University of Tokyo)
Matthew Morrow (CNRS & Université Paris-Saclay)
Wiesława Nizioł (CNRS & Sorbonne Université)
Emanuel Reinecke (University of Copenhagen)
Ryotaro Sakamoto (University of Tsukuba)
Takumi Watanabe (University of Tokyo)
Daxin Xu (Morningside Center of Mathematics)
Mingjia Zhang (Princeton University)*
Weizhe Zheng (Morningside Center of Mathematics)

 
Organizers: 

Ahmed Abbes (CNRS, IHES)
Laurent Berger (ENS de Lyon)
Takashi Hara (Tsuda University)
Atsushi Shiho (University of Tokyo)
Yuri Yatagawa (Institute of Science Tokyo)

Partial Differential Equations, Analysis and Geometry    A Conference in Honor of Sergiu Klainerman’s 75th Birthday    January 12-16 2026    at IHES – Marilyn and James Simons Conference Center    How to get to IHES
Registration is free but compulsory and open until December 31, 2025. 

Sergiu Klainerman, Eugene Higgins Professor of Mathematics at Princeton University, has made seminal contributions to nonlinear partial differential equations, analysis, differential geometry, and mathematical general relativity. He pioneered the vector field method for nonlinear wave equations, developed multilinear techniques for low-regularity analysis, and established landmark results on the stability of Minkowski space and Kerr black holes. His work has reshaped PDE, analysis, geometry, and relativity, training and inspiring generations of mathematicians.
Throughout his career, Sergiu Klainerman has received many distinctions, including:

Sloan Fellowship (1983–1985)

MacArthur Fellowship (1991–1996)

Guggenheim Fellowship (1997–1998)

Bôcher Memorial Prize, American Mathematical Society (1999)

Fellow of the American Academy of Arts and Sciences (1996)

Foreign Member of the French Academy of Sciences (2002)

Member of the U.S. National Academy of Sciences (2005)

Israel Gelfand Chair, IHÉS (2017–2019)

 
The conference will celebrate Sergiu Klainerman’s 75th birthday by bringing together experts to present recent advances in analysis, PDE, geometry, and general relativity, with the aim of fostering interaction across fields and engaging early-career researchers in these exciting developments.
Speakers:

Scott Armstrong (Sorbonne Université)
Thibault Damour (IHES)
Camillo De Lellis (IAS)
Patrick Gérard (Univ. Paris-Saclay, LMO)
Elena Giorgi (Columbia University)
Alexandru Ionescu (Princeton University)
Philip Isett (Caltech)
Jonathan Luk (Stanford University)
Sung-Jin Oh (UC Berkeley)
Duong Phong (Columbia University)

Richard Schoen (UC Irvine)

Sylvia Serfaty (Sorbonne Université)

Jacques Smulevici (Sorbonne Université)

Gigliola Staffilani (MIT)

Daniel Tataru (UC Berkeley)

Vlad Vicol (NYU)

Hong Wang (IHES & NYU)

Qian Wang (University of Oxford)

Pin Yu (Tsinghua University) 

Scientific committee:     Frank Merle (IHES & CY Cergy Paris Université), Jérémie Szeftel (Sorbonne Université)
Organizing committee:     Elena Giorgi (Columbia University), Markus Keel (University of Minnesota), Jérémie Szeftel (Sorbonne Université)
 

Combinatorics and Arithmetic for PhysicsThe meeting focuses on questions of discrete mathematics and number theory, emphasizing computability. Problems are drawn mainly from theoretical physics: renormalization, combinatorial physics, geometry, evolution equations (commutative and noncommutative), or related to its models, but not only. Computations, based on combinatorial structures (graphs, trees, words, automata, semirings, bases), or classical structures (operators, Hopf algebras, evolution equations, special functions, categories) are good candidates for computer-based implementation and experimentation.
Organized by: Gérard H. E. DUCHAMP, Maxim KONTSEVICH, Gleb KOSHEVOY and Karol A. PENSON.
Speakers:

Cyril Banderier (LIPN)
Marek Bożejko (Wroclaw University)
Philippe Di Francesco (IPhT Saclay)
Vladimir Dotsenko (Université de Strasbourg)
Vladimir Fock (IRMA Strasbourg)
Oleg Kaikov (LIST, Saclay)
Arthemy Kiselev (University of Groningen)
Maxim Kontsevich (IHES)
Pierre-Vincent Koseleff (IMJ-PRG)
Gleb Koshevoy (IITP, Moscow)
Anastasia Matveeva (École polytechnique)
Thomas Müller (LIPN, Paris)
Hiroaki Nakamura (Osaka University)
Toshiki Nakashima (Sophia University Tokyo)
Lucas Pannier (Université de Versailles Saint-Quentin en Yvelines)
Karol Penson (LPTMC, Sorbonne Université)
Parham Radpay (Université Paris-Saclay)
Kilian Raschel (Université d’Angers)
Vladimir Roubtsov (Université d’Angers)
Thomas Simon (Université de Lille)
Reiko Toriumi (Okinawa Institute of Science and Technology)
 

Sponsors: IHES – Math-STIC – LIPN (UMR-7030) – LPTMC (Univ-Paris 6) –   INRIA – GDR EFI 
Scientific Committee:Joseph Ben Geloun (LIPN-Paris XIII), Alin Bostan (INRIA), Marek Bożejko (Wroclaw University), Vincent Rivasseau (Orsay-CEA), Pierre Simonnet (Univ. Corse)

 
 

This one-day workshop is organised jointly by Huawei and IHES, as a part of the IHES-Huawei partnership. The aim of the workshop is to bring together prominent voices from academia and industry to explore the evolving role of causal reasoning in artificial intelligence. The workshop will deliver meaningful dialogue around two major directions. The first one is theory-driven causal modelling, which focuses on theoretical approaches, frameworks, and tools for understanding causality, emphasizing the development of rigorous methods to identify, estimate, and interpret causal relationships. The second topic is machine learning with causal AI and its applications, which integrates machine learning and deep learning techniques to improve causal discovery, causal inference, causal representation learning and their corresponding application fields.
INVITED SPEAKERS: 

BOWDEN Jack (Exeter University, UK)
CADEI Riccardo (EPFL, Switzerland)
FUNG Pascale (HKUST & Visiting Professor at the Central Acad. of Fine Arts in Beijing)
HENCKEL Leonard (Univ. College, Dublin, UK)
LI Haoxuan (Peking University)
LIMNIOS Myrto (EPFL, Switzerland)
TIAN Jin (MBZUAI, Abu Dhabi)
ZHOU Hong (Huawei)

 
 

 
 
Organisers: Keshuang Li (Huawei), Keli ZHANG (Huawei)

The goal of this conference is to advance the dialogue and interactions between the LLM community and the larger world of mathematics in order to further the mathematical understanding of LLMs and contribute to solving some of the outstanding problems in the new field of LLMs.
 
In particular we intend to investigate mathematical structures that can be used to understand LLMs in terms of what they implicitly learn and how. 
 
At the same time, in the opposite direction the use of LLMs in order to do mathematics will be investigated.
 
Registration is free and open until May 15, 2025.
Invited speakers:Katie Collins (Cambridge University)Yann Fleureau (Numina)Fabian Glöckle (Ecole Nationale des Ponts et Chaussées & FAIR at Meta, Paris)Javier Gómez-Serrano (Brown University)Timothy Gowers (Collège de France)Yann Ollivier (FAIR at Meta, Paris)Simon Frieder (Oxford University)
Organizers: François Charton (Meta AI Research), Michael Douglas (Harvard University & IHES), Amaury Hayat (CERMICS) & Yiannis Vlassopoulos (Athena Research Center & IHES)
 

New Structures and Techniques in p-adic Geometry        October 27-31, 2025 at IHES – Marilyn and James Simons Conference Center    How to get to IHES

In recent years, p-adic geometry has benefited from several new ideas. The goal of this conference is to invite experts to give lectures explaining some of these ideas and their uses.  The main themes are: motivic methods, categorical p-adic Langlands, and Igusa stacks.  Besides these mini-courses, there will also be some individual lectures by selected participants.
 Registration deadline: June 30, 2025
Speakers:

Johannes Anschütz (Université Paris-Saclay)
Ana Caraiani (Imperial College London)
Gabriel Dospinescu (CNRS, Université de Clermont-Auvergne)
Veronika Ertl (Université de Caen)
Eugen Hellmann (Universität Münster)
Kalyani Kansal (Imperial College London)
Dongryul Kim (Stanford University)
Arthur-César Le Bras (Université de Strasbourg)
Shubhodip Mondal (Purdue University)
Timo Richarz (TU Darmstadt)
Alberto Vezzani (Università degli Studi di Milano)
Mingjia Zhang (IAS, Princeton)

Organizing committee:     Dustin Clausen (IHES), Toby Gee (Imperial College London), Wiesława Nizioł (IMJ-PRG)
This conference is supported by the Simons Collaboration on Perfection in algebra, geometry, and topology

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, fairness, statistics will be presented. This workshop is particularly intended for doctoral and post-doctoral researchers.
 
Registration is free and open until March 25, 2025.
Invited speakers:Anne Auger (Inria Saclay)Etienne Boursier (Inria, Université Paris-Saclay)Solenne Gaucher (École polytechnique)Charlotte Laclau (Télécom Paris)Arshak Minasyan (CentraleSupélec)Nicolas Vayatis (ENS Paris-Saclay)
Organizers: Evgenii Chzhen (Laboratoire de Mathématiques d’Orsay, Université Paris-Saclay)Erwan Le Pennec (École polytechnique)

Arithmetic and Diophantine Geometry, via Ergodic Theory and o-minimality    A Conference in Honor of Emmanuel Ullmo’s 60th Birthday    September 8-12 2025 at IHES – Marilyn and James Simons Conference Center    How to get to IHES

This conference aims to honor the spectacular contributions of Emmanuel Ullmo to arithmetic geometry and centers around his mathematical contributions and interests. It will cover and highlight recent stage of development on topics such as Diophantine geometry, ergodic theory, Hodge theory, and arithmetic dynamics.
 Registration deadline: August 31, 2025
Speakers:

Fabrizio Andreatta (Univ. degli Studi di Milano)
Uri Bader (Weizmann Inst. & Univ. of Maryland)
Benjamin Bakker (Univ. of Illinois, Chicago)
Gregorio Baldi (CNRS, IMJ-PRG)
Yves Benoist (CNRS, Univ. Paris-Saclay)
Anna Cadoret (IMJ-PRG, Sorbonne Univ.)
François Charles (ENS Paris)
Laura DeMarco (Harvard Univ.)
David Fisher (Rice Univ.)
Javier Fresán (IMJ-PRG, Sorbonne Univ.)
Philipp Habegger (Univ. of Basel)
Philippe Michel (EPFL)
Hee Oh (Yale Univ.)
Naomi Sweeting (Princeton Univ.)
Yunqing Tang (Caltech & UC Berkeley)
David Urbanik (IHES)
Xinyi Yuan (BICMR, Peking Univ.)
Mingjia Zhang (IAS & Princeton Univ.)
Shouwu Zhang (Princeton Univ.)
Wei Zhang (MIT)

 
Organizing committee:     Ahmed Abbes (CNRS, IHES), Jennifer Balakrishnan (Boston Univ.), Ziyang Gao (UCLA), Marc Hindry (Univ. Paris-Cité), Fanny Kassel (CNRS, IHES), Bruno Klingler (Univ. Humboldt zu Berlin), Yuri Tschinkel (NYU and Simons Foundation)
 

Combinatorics and Arithmetic for PhysicsThe meeting focuses on questions of discrete mathematics and number theory, emphasizing computability. Problems are drawn mainly from theoretical physics: renormalization, combinatorial physics, geometry, evolution equations (commutative and noncommutative), or related to its models, but not only. Computations, based on combinatorial structures (graphs, trees, words, automata, semirings, bases), or classical structures (operators, Hopf algebras, evolution equations, special functions, categories) are good candidates for computer-based implementation and experimentation.
Organized by: Gérard H. E. DUCHAMP, Maxim KONTSEVICH, Gleb KOSHEVOY, Sergei NECHAEV, and Karol A. PENSON.
Speakers:

Nicolas Behr, CNRS, Université de Paris, IRIF
Joseph Ben Geloun, LIPN-Paris XIII
Lara Bossinger, IM UNAM, Oaxaca & IAS, Princeton
Marek Bozejko, Wroclaw University
Stéphane Dartois, Université Paris Saclay, CEA
Jehanne Dousse, Université de Genève
Gérard H.E. Duchamp, LIPN, Université Paris Nord
Vladimir Fock, IRMA, Strasbourg
Darij Grinberg, Drexel University
Dimitry Gurevich, IITP, Moscow
Yuki Kanakubo, Ibaraki University
Arthemy Kiselev, University of Groningen
Maxim Kontsevich, IHES
Gleb Koshevoy, IITP, Moscow
Toshiki Nakashima, Sophia University Tokyo
Mohamed Ouerfelli, Université Paris Saclay, CEA
Karol A. Penson, LPTMC, Sorbonne Université
Gleb Pogudin, LIX, Ecole polytechnique
Markus Reineke, Ruhr University Bochum
Ioannis Vlassopoulos, Athena Research Center
 

Sponsors: IHES – Math-STIC – LIPN (UMR-7030) – LPTMC (Univ-Paris 6) –  IJCLab, UMR Paris-Saclay/CNRS – INRIA – GDR EFI – CEA
Scientific Committee:Joseph Ben Geloun (LIPN-Paris XIII), Alin Bostan (INRIA), Marek Bozejko (Wroclaw University), Vincent Rivasseau (Orsay-CEA), Pierre Simonnet (Univ. Corse)

Representations, Probability, and Beyond: A Journey into Anatoly Vershik’s World Workshop in memory of A.M. Vershik
November 18-19, 2024, Mikhail Gromov (IHES & NYU), Sergei Nechaev (LPTMS Paris-Saclay) and Volodya Rubtsov (Univ. Angers) organize a two-day workshop devoted to the memory of Anatoly Vershik, who passed away earlier this year.
Anatoly Vershik (1933-2024) was a Russian mathematician who made important contributions in several fields of mathematics. In particular, he is renowned for his joint work with Sergei V. Kerov on the theory of representations of infinite symmetric groups and on applications of the longest strictly increasing subsuite problem in group theory. 
 
 
Invited Speakers:

Alexander BARVINOK (Univ. of Michigan)
Alexey BORODIN (MIT)
Alexander CHERVOV (Institut Curie)
Anna ERSCHLER (Sorbonne Univ.)
Sergey FOMIN (Univ. of Michigan)
Mikhail GROMOV (IHES & NYU)
Vadim KAIMANOVICH (Univ. of Ottawa)
Andrey MALYUTIN (St. Petersburg State Univ.)
Tatiana NAGNIBEDA (Univ. Genève)
Sergei NECHAEV (LPTMS Paris-Saclay)
Andrey OKOUNKOV (Princeton Univ.)
Grigorii OLSHANSKII (IITP, Moscow)
Leonid PASTUR (King’s College London)
Fyodor PETROV (St. Petersburg State Univ.)
Volodya RUBTSOV (Univ. d’Angers)
Natalia TSILEVICH (Bar Ilan University)

 

Mathematics on the Crossroad of Centuries    A Conference in Honor of Maxim Kontsevich’s 60th Birthday    September 16-20 2024    at IHES – Marilyn and James Simons Conference Center    How to get to IHES

The  work of Maxim Kontsevich, Permanent Professor at IHES since 1995, and holder of the AXA-IHES Chair for Mathematics, has been a unique combination of spectacular ideas in algebra, combinatorics, topology, algebraic geometry, and theoretical physics. 
No other mathematician has played such a pivotal role in enhancing the interaction of mathematics and physics on the crossroad of 20th and 21st centuries. 
In this week-long meeting we will be celebrating the 60th birthday of Maxim Kontsevich and his profound influence on mathematics.
Registrations are closed but talks can be followed online on Zoom: https://us02web.zoom.us/webinar/register/WN_d2PEiUS9Q9imvBtm4Y0Wzg
Speakers:

Mohammed Abouzaid, Stanford University
Mina Aganagić, UC Berkeley
Jørgen Andersen, Odense University
Denis Auroux, Harvard University 
Tom Bridgeland, University of Sheffield 
Vladimir Drinfeld, University of Chicago 
Pavel Etingof, MIT 
Kenji Fukaya, SCGP 
Davide Gaiotto, Perimeter Institute
Alexander Goncharov, Yale University 
Fabian Haiden, Syddansk Odense University 
Mikhail Kapranov, IPMU 
Curtis McMullen, Harvard University 
Takuro Mochizuki, RIMS, Kyoto University 
Alexander Odesskii, Brock University 
Tony Pantev, University of Pennsylvania 
John Pardon, SCGP 
Yan Soibelman, Kansas State Univ. & IHES 
Yuri Tschinkel, SCGP & New York University 
Lauren Williams, Harvard University 
Don Zagier, MPI Bonn & ICTP

Organizing committee:     Denis Auroux, Harvard University, Ludmil Katzarkov, University of Miami, Tony Pantev, University of Pennsylvania, Yan Soibelman, Kansas State Univ. & IHES, Yuri Tschinkel, SCGP & New York University