This year, the Special event for all math post-doc from Paris Region will take place on Tuesday, October 21, 2025, at IHES, in the Marilyn and James Simons Conference center.

Organized jointly with the FMJH and the FSMP, the goal of this welcome day is to provide young mathematicians with an opportunity to meet their colleagues, help newcomers find out more about the mathematical environment in the Paris region, including possible funding opportunities for future research projects, and give an overview of the French (academic) job market.

To attend this special day, go to the FMJH website to register.

On May 26, IHES will host a one-day workshop organised jointly with Huawei, 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 :

• Jack Bowden, Exeter University
• Riccardo Cadei, École Polytechnique Fédérale de Lausanne
• Pascale Fung, HKUST & Visiting Professor at the Central Acad. of Fine Arts in Beijing
• Leonard Henckel, University College Dublin
  
• Haoxuan Li, Peking University
• Myrto Limnios, École Polytechnique Fédérale de Lausanne
• Jin Tian, Mohamed bin Zayed University of Artificial Intelligence
• Hong Zhou, Huawei

Registrations are now open in the workshop web page.

On May 22, IHES will host a one-day conference on mathematics and large language models, entitled “Mathematics for and by Large Language Models (LLM)”.

Organized by François Charton, Meta AI Research, Michael Douglas, Harvard University & IHES, Amaury Hayat, CERMICS and Yiannis Vlassopoulos, Athena Research Center & IHES, the goal of this conference is to advance the dialogue and interactions between the LLM community and the larger world of mathematics.

Invited speakers will deepen the mathematical understanding of LLMs and contribute to solving some of the outstanding problems in the new field of LLMs. In particular, they 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.

Invited speakers:

• Katie Collins, Cambridge University
• Yann Fleureau, Numina
• Frieder Simon, Oxford University
• Fabian Glöckle, École Nationale des Ponts et Chaussées & FAIR at Meta, Paris
• Javier Gómez-Serrano, Brown University
• Timothy Gowers, Collège de France
• Yann Olivier, FAIR at Meta, Paris

Registration on the conference webpage until May 15, 2025.

LSC, for Life, Structure, and Cognition, is an initiative led by Yves Barral (ETH Zurich), Eugene Koonin (NIH), Mikhail Gromov (IHES, Université Paris-Saclay) and Robert Penner (IHES, Université Paris-Saclay). The 2024 edition will take place from June 17 to 20, 2024, at IHES, with the theme “A Multitude of Time”.

For four days, LSC 2024 will bring together scientists from all fields, focusing on time and its variations within social, biological and physical systems. The aim of the meeting is to present the latest advances in our understanding of time as a multifaceted concept and its many implications for different aspects of life.

A conference for the general public will also be held at the Institut Jacques Monod in Paris, on June 19, 2024. Given by Lera Boroditsky, Professor of Cognitve Science at University of California in San Diego, it will focus on how languages and cultures construct time.

To find out more about the 2024 LSC event, and to learn more about the program, visit the dedicated web page.

Guest speakers at 2024 LSC are:

• Yves Barral, Cellular Biology, ETH Zurich
• Lera Boroditsky, Relationships Between Mind, World and Language, UC San Diego
• Julien d’Huy, Evolution and Spreading of Myths, Collège de France
• Margarete Diaz Cuadros, Species-Specific Developmental Rates, Massachusetts General Hospital & Harvard University
• Thomas Michaels, Theoretical Biological Physics, ETH Zurich
• Leon Peshkin, Aging Clocks, Harvard Medical School
• Joe Thornton, Molecular Mechanisms of Evolution, University of Chicago
• Warrick Roseboom, Time Perception, Perceived Causality, and Memory, University of Sussex
• Cédric Villani, Application of Mathematics to Physics, IHES & Université de Lyon

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The goal of the LSC meeting is to provide an annual update on the latest advancements in LSC components and to explore the modalities for cooperative progress between Biology and Artificial Intelligence (AI). The objective is to investigate how biological systems evolved cognitive functions, using AI both as a concept toolbox and as a tool; and in turn, to investigate how biological systems can serve as models for understanding and stimulating new advances in AI.

The idea is to organize an annual evaluation, expert discussion, and lecture series on these topics, given by world experts covering multiple disciplines.

The first edition of LSC 2022 can be found here.
The second edition of LSC 2023 can be found here.

The Seed Seminar of Mathematics and Physics is a seminar series that aims to foster interactions between mathematicians and theoretical physicists, with both online and in-person events.

This year, a special day is organized at IHES on June 7, 2024 by par Ariane Carrance (CMAP), Matteo D’Achille (LMO) et Edoardo Lauria (LPENS). The day will focus on Matrix models for quantum systems, with contributions from Guillaume Aubrun (Institut Camille Jordan), Philippe Biane (Laboratoire d’Informatique Gaspard Monge), Bertrand Eynard (Institut de Physique Théorique, CEA Saclay) et Vladimir Kazakov (Laboratoire de Physique, ENS Paris).

Registration is free and open until May 31, 2024.
Registration for either in-person or online participation at the following link: https://indico.math.cnrs.fr/event/12052/registrations/1129/

To celebrate the 70th anniversary of Albert Schwarz‘s scientific career, IHES will host a one-day mini-conference on June 14, organized by Anton Kapustin (Caltech) et Maxim Kontsevich (IHES).

Albert Schwarz started as a topologist/geometer in the early ’50s. In the ’70s, he began an exploration of mathematical aspects of quantum field theory and made numerous seminal contributions to this subject. He has been a regular visitor to IHES since 1995 and was involved in many significant collaborations.

This May he will give a Cours de l’IHES on his recent research, entitled “Quantum Mechanics and Quantum Field Theory from Algebraic and Geometric Viewpoints”

This mini-conference is a tribute to the 70th anniversary of Schwarz’s remarkable scientific career by several of his friends and colleagues.

Invited speakers:

• Alain Connes, Collège de France & IHES
• Anton Kapustin, Caltech
• Maxim Kontsevich, IHES
• Boris Pioline, LPTHE – Sorbonne Université
• Albert Schwarz, University of California at Davis & IHES

Registration on the conference webpage until June 7, 2024.

On June 6, 2024, the Institute will host the conference “On Systems of Interacting Particles”, organized by Laetitia Colombani (CMAP), and Pierre Le Bris (IHES postdoc).

The study of (large) systems of interacting particles in mathematics is a subject with multiple applications that can be approached from a wide variety of viewpoints and methods. The aim of this day is to bring together young researchers working on similar objects with different tools to discuss and compare methods.

The conference will feature five long presentations discussing recent advances while retaining an introductory focus, presented by:

• Thomas Cavallazzi, CentraleSupélec, Paris-Saclay
• Louis-Pierre Chaintron, DMA, ENS
• Antonin Chodron de Courcel, IHES
• Rodrigue Lelotte, CERMICS, ENPC
• Sonia Velasco, MAP5, Paris-Cité

Registration is free and open until May 30, 2024.

On May 23, IHES will host a one-day conference on mathematics and large language models, entitled “Mathematics for and by Large Language Models (LLM)”.

Organized by François Charton, Meta AI Research, Michael Douglas, Harvard University & IHES, and Yiannis Vlassopoulos, Athena Research Center & IHES, the goal of this conference is to advance the dialogue and interactions between the LLM community and the larger world of mathematics.

Invited speakers will deepen the mathematical understanding of LLMs and contribute to solving some of the outstanding problems in the new field of LLMs. In particular, they 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.

Invited speakers:

• François Charton, Meta AI Research
• Andrew Dudzik, Google DeepMind
• Amaury Hayat, École des Ponts ParisTech & CERMICS
• Julia Kempe, NYU Center for Data Science & CIMS
• Gabriel Synnaeve, Meta AI Research
• Yiannis Vlassopoulos, Athena Research Center & IHES

Registration on the conference webpage until May 16, 2024.

IHES is delighted to announce the 9th edition of the Statistics & Computer Science Day for Data Science in Paris-Saclay, on Wednesday April 3, 2024.

Organized by Evgenii Chzhen (LMO/Univ. Paris-Saclay), and Florence Tupin (LTCI/Télécom Paris), the aim of this statistical and computer science day is to bring together mathematicians and computer scientists around some talks on recent results from statistics and machine learning.

Various topics in machine learning, optimization, deep learning, or optimal transport will be presented.

This workshop is particularly intended for doctoral and post-doctoral researchers.

The invited speakers are:
– Florence D’Alché-Buc, LTCI/Télécom Paris
– Luca Ganassali, LMO/Université Paris-Saclay
– Marine Le Morvan, SODA/INRIA Saclay
– Erwan Le Pennec, CMAP/École polytechnique
– Gilles Stoltz, CNRS/LMO/Université Paris-Saclay
– Maria Vakalopoulou, MICS/Centralesupélec

Registration on the conference webpage until March 27, 2024.

December 2023 marks Yvonne Choquet-Bruhat’s 100th birthday. For this special occasion, IHES organizes a day in her honor on December 8, 2023.

Yvonne Choquet-Bruhat’s work has had a long-lasting impact on the field of mathematical relativity starting with her seminal 1952 paper on the local well-posedness of Einstein equations. Her numerous contributions, both to constraint equations and to the evolution problem in general relativity, have deeply influenced several generations of researchers. This special day in her honor will be the occasion to present some of the latest developments in the field.

Registration is free but mandatory.

Invited Speakers:
– Thibault Damour, IHES
– Michael Eichmair, Université de Vienne
– Cécile Huneau, École polytechnique
– Sergiu Klainerman, Université de Princeton

Organizers: Laure Saint-Raymond (IHES) & Jérémie Szeftel (Laboratoire Jacques-Louis Lions)

From November 15 to 17, 2023, IHES will host the CAP Days, “Combinatorics and Arithmetic for Physics”, organized by Gérard H. E. DUCHAMP (LIPN, Université Paris Nord), Maxim KONTSEVICH (IHES), Gleb KOSHEVOY (ITTP, Moscow & IHES), Sergei NECHAEV (Université Paris Saclay), and Karol A. PENSON (LPTMC, Sorbonne University).
Click here to register
(registration required before November 13).

The 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.

More information on the dedicated web page or here.

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See the list of guest speakers:
Marek Bozejko (Institute of Mathematics Wroclaw University), Ricardo Buring (INRIA), Philippe Di Francesco (UIUC), Gérard H. E. Duchamp (LIPN, Université Paris Nord), Harold Erbin (CTP, MIT, USA), Stéphane Gaubert (INRIA, CMAP, École polytechnique), Volker Genz (IBS CGP), Darij Grinberg (Drexel University), Dimitry Gurevich (IITP, Moscou), Yuki Kanabuko (MPIM, Bonn), Rinat Kedem (UIUC), Maxim Kontsevich (IHES), Gleb Koshevoy (IITP, Moscow & IHES), Thomas Krajewski (CPT, Marseille), Marek Kus (Center for Theoretical Physics), Hiroaki Nakamura (Osaka University), Toshiki Nakashima (Sophia University Tokyo), Hadrien Notarantonio (Inria Saclay), Karol A. Penson (LPTMC, Sorbonne Université), Eric Pichon-Pharabod (Université Paris-Saclay), Sanjaye Ramgoolam (Queen Mary University of London), Travis Scrimshaw (Hokkaido University), Andrea Sportiello (LIPN, Université Paris Nord), Adrian Tanasa (Université de Bordeaux), Vasily Sazonov (CEA), Jean-Bernard Zuber (LPTHE, Sorbonne Université), and Karol Życzkowski (Jagiellonian University).

Scientific Committee:
Joseph Ben Geloun (LIPN-Paris XIII), Alin Bostan (INRIA),Marek Bozejko (Wroclaw University), et Vincent Rivasseau (Orsay-CEA).

Sponsors: 
IHES – Math-STIC – LIPN (UMR-7030) – LPTMC (Univ-Paris 6) – INRIA Saclay – GDR EFI – CEA

Itzykson Seminar – FMJH

Depuis 2012, l’axe math-physique de la Fondation Mathématique Jacques Hadamard (FMJH) organise un séminaire Itzykson tous les ans à l’IHES. Le but de ce séminaire est de rassembler une communauté scientifique autour des mathématiques et de la physique fondamentale dans la région de Saclay, incluant notamment les étudiants en master, en doctorat ou en séjour post-doctoral.

Since 2012, the math-physics axis of the Fondation Mathématique Jacques Hadamard (FMJH) organized an Itzykson Seminar once or twice a year at IHES. The goal of this seminar is to gather a scientific community around mathematics and fundamental physics in the Saclay area, including students in master’s, Ph.D., or post-doctoral studies.

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This year, the 10th seminar will be held at the Institute on Monday, November 20, 2023.

Organized by Maxim Kontsevich (IHES), Sylvain Ribault (IPhT Saclay) and Pierre Vanhove (IPhT Saclay), it will focus on the theme of “Dénombrement de cartes : entre combinatoire, probabilités et physique théorique”.

Maps – surfaces obtained by joining polygons along their edges – have been of interest to various fields of mathematics, computer science, and physics for decades. In particular, if the overlap is random, we obtain random maps, which can be used to describe stochastic processes. If we also decorate random maps, we can describe statistical physics models such as the O(n) loop model.

During the day, various aspects of maps will be presented, from enumeration problems to physical applications, from fundamental ideas to recent developments.

A lecture and two talks will be given by Mireille Bousquet-Mélou (CNRS, LaBRI, Université de Bordeaux), Igor Kortchemski (CNRS, École polytechnique & ETH Zurich), and Jérémie Bouttier (IMJ-PRG, Sorbonne Université).

Participation is free but registration is compulsory until November 13, 2022. The seminar will be filmed and broadcast online after the event.