This year, the Special event for all math post-doc from Paris Region will take place on Tuesday, October 17, 2023, 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.

Discover the program:
08:30 – Morning Coffee
08:50 – Words of Welcome by Emmanuel Ullmo (IHES)
08:55 – Béatrice de Tilière (CEREMADE) and Pascal Massart (LMO) « The FSMP and FMJH’s Programs for Postdocs »
09:15 – Eduardo Alves da Silva (LMO) « A Glimpse of Algebraic Geometry and the Interplay of Log Calabi-Yau Geometry and Cremona Maps »
09:45 – Amanda Hirschi (IMJ-PRG) « Counting Curves Virtually »
10:15 – Gabriele Vanoni (IRIF) « Computational Complexity, Compositionality, and the Lambda-Calculus »
10:45 – pause
11:20 – Ariane Martin (CentraleSupélec) et Fabrice Rouillier (INRIA) « What we do, and how to get involved with MATh.en.JEANS and Animath »
11:30 – Solenne Gaucher (ENSAE) « An Introduction to Statistical Fairness »
12:00 – Arthur Touati (IHES) « An Introduction to Mathematical Relativity »
12:30 – Pierre Pansu (LMO) « The Job Market in France and Paris-Saclay’s ReconvertAI Program»
12:50 – Sylvie Benzoni (IHP) « The Institut Henri Poincaré and the Maison Poincaré Museum »
13:00 to 14:30 – Lunch Buffet at IHES

Clément Mouhot, holder of the Schlumberger Chair for Mathematical Sciences and professor at Cambridge University, organizes “Evolutionary Equations” Day at IHES on October 12.

The goal of the one-day workshop is to explore and encourage interplays between probabilistic and deterministic approaches to evolution equations.

There will be four introductory longer talks about recent novel approaches, and three shorter talks reporting progresses on open problems, presented by:

• Thierry Bodineau (IHES)
• François Golse (École polytechnique)
• Laura Kanzler (Université Paris-Dauphine)
• Pierre Le Bris (IHES)
• Stéphane Mischler (Université Paris-Dauphine)
• Iván Moyano (Université Côté-d’Azur & Imperial College, London)
• Arthur Touati (IHES)

More information on the dedicated page.

This day is organized as part of the
“Schlumberger Chair for Mathematical Sciences”.

Jan Nekovář (1963-2022) was a mathematician who worked and made many significant and seminal contributions to algebraic geometry. He left us prematurely in November 2022.

In his memory, Anna Cadoret, IMJ-PRG, Wiesława Nizioł, IMJ-PRG, and Sarah Zerbes, ETH Zürich, organize a conference in arithmetic algebraic geometry at IHES from October 9th to 13th, 2023

The aim of this international conference is to cover some of the most recent advances in arithmetic geometry, focusing on the areas Jan Nekovář was interested in.

Information on the dedicated web page.

Here is a tribute note (in French) by Pierre Colmez (CNRS).

Invited Speakers:

• Tomoyuki Abe, IPMU – University of Tokyo  
• Spencer Bloch, University of Chicago  
• Ana Caraiani, Imperial College London – University of Bonn
• Henri  Darmon, McGill University  
• Vesselin Dimitrov, Institute for Advanced Studies
• Matthew  Emerton, University of Chicago  
• Veronika  Ertl, Universitat Regensburg
• Hélène Esnault, Frei Universität Berlin
• Olivier Fouquet, Université de Franche-Comté
• Alexander Goncharov, Yale University 
• Giada Grossi, CNRS, Université Sorbonne Paris Nord
• Jie Lin, Universität Duisburg-Essen 
• David  Loeffler, University of Warwick 
• Akhil Mathew, University of Chicago
• James Newton, University of Oxford 
• Alexander Petrov, Harvard University
• Alena Pirutka, New York University 
• Tony Scholl, University of Cambridge
• Yunqing Tang, University of California – Berkeley 
• Jacob Tsimerman, University of Toronto

The year 2023 marks the centenary of the birth of René Thom, a permanent professor at IHES from 1963 to 1990. On this occasion, IHES organizes a three-day conference on September 20, 21, and 22, 2023.

Several presentations will be given by lecturers during this three-day:

• Norbert A’Campo, Univ. De Bâle
• Daniel Bennequin, Institut Mathématique de Jussieu (IMJ-PRG)
• Alain Chenciner, IMCCE/Observatoire de Paris
• Antoine Danchin, Institut Pasteur
• Ivar Ekeland, Université Paris-Dauphine
• Sara Franceschelli, ENS Lyon
• Emmanuel Giroux, CNRS et ENS
  
• Mikhail Gromov, IHES
• Krzysztof Kurdyka, Université Savoie Mont Blanc
• Cherif Matta, Mount Saint Vincent University, Halifax, Canada
• Jean Petitot, EHESS
• Oscar Randal-Williams, Université de Cambridge
• Ana Rechtman, Université Grenoble-Alpes
• Dennis Sullivan, City University of New York, Graduate Center                     
• Bernard Teissier, IMJ-PRG
• Wolfgang Wildgen, Université de Brême

Scientific Committee: Marie-Claude Arnaud, IMJ-PRG, Marc Chaperon, IMJ-PRG, coordinateur, Antoine Danchin, Institut Pasteur, Yakov Eliashberg, Stanford University, Maxim Kontsevitch, IHES, Cédric Villani, Université Lyon I & IHES.

Registration and information on the dedicated web page.

A colloquium is also organized on September 19, 2023, at the Académie des Sciences, from 2:30 to 5:30 p.m. which will explore the intellectual legacy of René Thom (registration).

The next Summer School, organized by Benjamin Antieau (Northwestern University), Lars Hesselholt (University of Copenhagen / Nagoya University), and Matthew Morrow (CNRS and Université Paris-Saclay) will focus on the recent advances in algebraic K-theory, for two weeks. It will be held at IHES from July 11 to 29, 2023.

Bhargav Bhatt (IAS and Princeton University / University of Michigan), Wiesia Niziol (CNRS and Sorbonne Université), and Akhil Mathew (University of Chicago) are the members of the scientific committee for this 2023 edition.

In the style of an Oberwolfach Arbeitsgemeinschaft, ten talks will be given during this 2023 Summer School, by postdoctoral participants on the topic of syntomic and étale motivic cohomology.

If you want to participate, please send your application before February 15, 2023. The selected applicants will be informed on mid-April at the latest.

Algebraic K-theory

The last few years have witnessed an explosion of progress in algebraic K-theory. Derived algebraic geometry and non-commutative methods have been refined into powerful tools, especially through the theory of localizing invariants. Trace methods have brought K-theory and topological cyclic homology closer together than ever before. Perfectoid techniques mean that K-theory benefits from the recent progress in p-adic cohomology, such as prismatic cohomology. Condensed mathematics provides at long last a uniform approach to the K-theory of topological rings. Geometric foundations for motivic stable homotopy theory have been laid and new motivic filtrations have been unearthed.

The goal of the 2023 Summer School will be to help bring the participants up to date on these exciting developments, via research lectures, mini-courses, and an Arbeitsgemeinschaft on the topic of syntomic and étale motivic cohomology.

The mini-courses will be given by:

• Johannes Anschutz (University of Bonn)
• Dustin Clausen (University of Copenhagen and IHES)
• Elden Elmanto (Harvard University)
• Ryomei Iwasa (Université Paris-Saclay)
• Georg Tamme (University of Mainz)

The research lectures will be given by:

• Kęstutis ČESNAVIČIUS (CNRS and Université Paris-Saclay)
• Shane KELLY (University of Tokyo)
• Moritz KERZ (University of Regensburg)
• Hana Jia KONG (Institute for Advanced Study)
• Achim KRAUSE (University of Münster)
• Thomas NIKOLAUS (University of Münster)
• Arpon RAKSIT (Massachusetts Institute of Technology)
• Charanya RAVI (Indian Statistical Institute, Bangalore)
• Kirsten WICKELGREN (Duke University)
• Maria YAKERSON (CNRS and Sorbonne Université)

More information on the dedicated webpage.

This is an IHES Summer School organized in partnership with the Clay Mathematical Institute and in part of a project that has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 101001474).

From June 19 to 23, 2023, the Institut will host the workshop Homogeneous Dynamics and Geometry in Higher-Rank Lie Groups, organized by Martin Bridgeman, Boston College, Richard Canary, University of Michigan, Fanny Kassel, CNRS & IHES, Hee Oh, Yale University, Maria Beatrice Pozzetti, Universität Heidelberg, and Jean-François Quint, CNRS & Université de Bordeaux.

The workshop aims to explore links between homogeneous dynamics and recent developments on infinite-covolume discrete subgroups of Lie groups, including images of Anosov representations and generalizations. There will be three minicourses and a dozen research talks.

There will be 3 mini-courses given:
– Jean-François Quint, CNRS & Université de Bordeaux,
– Tengren Zhang, National University of Singapore,
– and Andrés Sambarino, CNRS & IMJ-PRG, and Minju Lee, University of Chicago.

Research Talks will be given:
– Pierre-Louis Blayac, University of Michigan
– León Carvajales, Universidad de la Republica, Montevideo
– Nguyen-Thi Dang, Université Paris-Saclay
– Sam Edwards, Durham University
– François Labourie, Université Côte d’Azur
– Sara Maloni, University of Virginia
– Giuseppe Martone, Yale University
– Wenyu Pan, University of Toronto
– Rafael Potrie, Universidad de la Republica, Montevideo
– Pratyush Sarkar, UC San Diego
– Andrew Zimmer, University of Wisconsin, Madison

For more information, see the dedicated page.

LSC, for Life, Structure, and Cognition, is a new initiative led by Yves Barral (ETH Zurich), Mikhail Gromov (IHES, University of Paris-Saclay), Eugene Koonin (NIH), and Robert Penner (IHES, University of Paris-Saclay). The 2023 edition will take place from June 26 to 30, 2023, at IHES, with the theme “Evolution & Learning”.

Over the course of a week, 2023 LSC will bring together scientists from all fields to present the latest progress in understanding evolution as a process of learning, and conversely, evolution of learning, in the context of their respective disciplines.

A conference for the general public will also be held at the Institut Jacques Monod in Paris. Given by Pierre-Yves Oudeyer, director of the Flowers team at INRIA Bordeaux Sud-Ouest and Université de Bordeaux, it will focus on evolution and learning.

To find out more about the 2023 LSC event, and to learn more about the program, visit the dedicated web page.

Guest speakers at 2023 LSC are:

• Yves Barral, ETH Zurich
• Michael Barnett, Max Planck Institute for Evolutionary Biology
• Anjali Bhat, University College London
• Dániel Czégel, Center for Ecological Research (Hungary) & Arizona State University
• Aliaksandr Damenikan, ETH Zurich
• Agathe Du Crest De Villeneuve, Université Paris 1 Panthéon Sorbonne
• Steven A. Frank, UC Irvine
• Mikhail Gromov, IHES & NYU
• Larry Guth, Geometry, MIT
• Solange Haas, Université Paris 1 Panthéon-Sorbonne
• Gautier Hamon, INRIA Bordeaux
• Yi Huang, Tsinghua University
• Philippe Huneman, CNRS/Université Paris 1 Sorbonne
• Dan Jarosz, Stanford University
• Eugene V. Koonin, National Center for Biotechnology Information, National Library of Medicine, National Institute of Health
• Yann LeCun, Courant Institute, New York University & Meta AI
• Purificación López-García, CNRS & Université Paris-Saclay
• Thomas Michaels, ETH Zurich
• Nicolas Minc, Institut Jacques Monod, U. Paris Cité/CNRS
• Rosalyn Moran, King’s College London
• Pierre-Yves Oudeyer, INRIA Bordeaux
• Bob Penner, IHES & UC Los Angeles
• Paul Rainey, Max Planck Institute for Evolutionary Biology, ESPCI Paris
• Grégoire Sergeant-Perthuis, INRIA Paris
• Eörs Szathmáry, Eötvös University
• Yukiko Yamashita, MIT
• Adam Yanai, Boston University
• Itai Yanai, New York University Langone Health

The goal of the 2023 LSC 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.

Frank Merle, a mathematician, and holder of the CY Cergy Paris Université – IHES Chair in Analysis, will be honored during the conference “Advances in Nonlinear Analysis and Nonlinear Waves” organized for his sixtieth birthday, from May 22 to 26, 2023.

Frank Merle has made many important and seminal contributions to the qualitative study of solutions of nonlinear partial differential equations coming from Physics. Merle’s work has been pioneering in the sharp analysis of blowup solutions and of the collision of solitons, as well as in the soliton resolution conjecture. His groundbreaking works have been very influential in the field and beyond.

Throughout his career, Frank Merle received many distinctions, including:

• ICM Invited Speaker (1998)
• Bôcher Memorial Prize – American Mathematical Society (2005)
• Silver Medal – Centre National de la Recherche Scientifique (2005)
• ERC Advanced Grant “Blow-up, Dispersion and Solitons” (2011)
• ICM Plenary Speaker (2014)
• Grand prix Ampère de l’électricité de France – French Academy of Sciences (2018)
• Member of the Academia Europaea (2020)

The scientific objective of the conference is twofold. First, several experts in the field of dispersive and wave equations will present their recent advances. A second objective is to propose some conferences in analysis beyond the field of dispersive PDEs. The Scientific Committee hopes that all talks will be accessible to a general audience in analysis.

Program and registration on the conference webpage.

Find the list of invited speakers:

• Henri Berestycki, EHESS
• Nicolas Burq, Université de Paris-Saclay
• Simon Brendle, Columbia University
• Maria Colombo, EPFL
• Panagiota Daskalopoulos, Columbia University
• Camillo De Lellis, IAS
• Thierry Giamarchi, Université de Genève
• François Golse, École polytechnique
• Oana Ivanovici, CNRS & Sorbonne Université
• Carlos Kenig, University of Chicago
• Sergiu Klainerman, Princeton University
• Pierre-Louis Lions, Collège de France
• Nader Masmoudi, NYU
• Hiroshi Matano, Meiji University
• Andrea Nahmod, University of Massachusetts
• Felix Otto, Max-Planck Institut fur Mathematik
• Pierre Raphaël, University of Cambridge
• Igor Rodnianski, Princeton University
• Wilhelm Schlag, Yale University
• Sylvia Serfaty, NYU
• Daniel Tataru, UC Berkeley
• Luis Vega, BCAM
• Sijue Wu, University of Michigan

Scientific Committee: M. Dafermos, A.-L. Dalibard, H. Duminil-Copin, T. Duyckaerts, E. Hebey, Y. Martel, G. Ponce, P. Raphaël, L. Saint-Raymond et H. Zaag

Organising Committee: C. Collot, R. Côte, F. Demengel, T. Duyckaerts, J. Jendrej, Y. Lan, E. Logak, Y. Martel, C. Muñoz, P. Raphaël, J. Szeftel, N. Tzvetkov et H. Zaag

The year 2023 marks the centenary of the birth of Louis Michel, the first Professor of Theoretical Physics at IHES. On this occasion, Thibault Damour and Slava Rychkov organize a one-day commemoration on May 15, 2023, at IHES.

Several presentations will be given by lecturers linked to Louis Michel or to his work:

• Jean-Pierre Bourguignon, CNRS-IHES
• Henri Epstein, CNRS-IHES
• Denis Gratias, CNRS-Institut de Recherche de Chimie Paris
• David Ruelle, IHES
• Slava Rychkov, IHES
• Marjorie Senechal, Smith College
• Boris Zhilinskii, Univ. du Littoral Côte d’Opale

Program

To participate in the commemoration of Louis Michel’s centenary, registration is free but mandatory on the dedicated web page.

Louis Michel (1923-1999),
Permanent Professor at IHES from 1962 to 1992.

Louis Michel was the first Permanent Professor in Theoretical Physics at IHES, which he joined in 1962. His scientific work made pioneering contributions in a wide area of theoretical physics, ranging from particle physics to crystallography. At IHES, Louis Michel found an appropriate setting to develop the leitmotiv of his scientific work: to deepen the mathematical roots underlying the symmetries of the laws of nature.

For a detailed analysis of Louis Michel’s scientific work, see the website created on the occasion of his 90th birthday, and the book Symmetries in Nature: The Scientific Heritage of Louis Michel (World Scientific Series in 20th Century Physics) edited by Thibault Damour, Ivan Todorov and Boris Zhilinskii (2014).

In order to honor his memory, IHES created in 2000 the Louis Michel Chair of Theoretical Physics for long-term visitors.

The main themes of his research at IHES – and his main collaborators – are:

• Relations between internal symmetries and relativistic invariance,
• Theory of spontaneous symmetry breaking and its application to high energy physics and the Jacobi ellipsoid, with Luigi A. Radicati, then to condensed matter physics, with Maurice Kléman and Gérard Toulouse,
• A general formalism for the description of the polarization of particles of any spin, with Manuel G. Doncel and Pierre Minnaert,
• Mathematical crystallography and representation of crystallographic groups, with Jan Mozrzymas and Boris Zhilinskii,
• New applications of symmetry to energy bands in solids, with Joshua Zak,
• The geometry of Euclidean lattices, with Marjorie Senechal.

Louis Michel played a significant role in the reconstruction of French Theoretical Physics in the 1950s. The list of his students bears witness to this in a striking way: Claude Bouchiat, Claude de Calan, Manuel Doncel, Henri Epstein, Gérard Flamand, Dimitri Fotiadi, Gérard Fuchs, Jean-Loup Gervais, Pierre Minnaert, Jean Nuyts, Eduardo de Rafael, Houcheng Rouhaninejad (= Henri Roane), Roland Seneor, Paul Sorba, and Raymond Stora (last in alphabetical order but first in chronological order).

For more information, see La Vie et l’Œuvre Scientifique de Louis Michel (in French), and the website.

Stéphane Mallat, professor at the Collège de France in data science, will be honored during a three-day workshop, April 19-21, 2023, organized by Joan Bruna (New York Univ.), and Gabriel Peyré (CNRS-ENS), on the occasion of his 60th birthday.

Programme of the workshop

In the past decades, Data Analysis and Machine Learning have gained a presence across all facets of society, from healthcare to fighting climate change. They now play an instrumental role as a driver for Science. Developing the mathematical foundations of data analysis is thus ever more important. 

Modern data analysis combines the statistical challenge of extracting useful information out of noisy, complex, high-dimensional data, with the modeling challenge of physical and biological processes, and the computational challenge of devising efficient algorithms, and as such, building their mathematical foundations is a uniquely cross-disciplinary endeavor. 

Harmonic Analysis quickly emerged as a bedrock to start such foundations. Over time the field succeeded in building accurate mathematical descriptions of naturally occurring physical phenomena, such as natural images, seismic waves, or speech, leading to a mature theory of signal processing and inverse problems, to name a few. Such a theory developed fundamental concepts such as sparsity and multi-resolution analysis, with precise statistical and computational guarantees. 

In this context, the data revolution of the last decade, spearheaded by Machine Learning and Neural Networks alongside their numerous successes in engineering and computational science, has given the mathematical community a new impetus to extend existing foundations and to build novel interfaces across disciplines – where Harmonic Analysis is playing a central role. Indeed, its core principles, namely using the geometry of the physical domain to define the concepts of scale and frequency – and leverage them to build powerful non-linear approximation spaces breaking the curse of dimensionality, are nowadays being connected with areas such as Neuroscience, Optimal Transport, Statistical Physics or Optimization, in order to address the new challenges of modern deep learning. 

The purpose of this meeting is to bring together some of the characters of this story, past, present, and future – and to celebrate the 60th birthday of a leading one amongst them, Stéphane Mallat, professor at Collège de France.

His journey through Harmonic Analysis, Machine Learning, and Physics has profoundly influenced how these areas have evolved and blended together, and are now breaking new ground in our theoretical understanding of modern data analysis.

Find the list of invited speakers:

• Akram Aldroubi (Vanderbilt)
• Francis Bach (INRIA)
• Richard Baraniuk (Rice)
• Freddy Bruckstein (Technion)
• Emmanuel Candès (Stanford)
• Maureen Clerc (INRIA)
• Maarten De Hoop (Rice)
• Dave Donoho (Stanford)
• Michael Elad (Technion)
• Rémi Gribonval (INRIA)
• Stéphane Jaffard (Créteil)
• Jérôme Kalifa (Let it Care)
• Hamid Krim (North Carolina State University)
• Gitta Kutyniok (München)
• Yann LeCun (New York University and Meta)
• Eric Moulines (Polytechnique)
• Edouard Oyallon (CNRS and Sorbonne)
• Naoki Saito (UC Davis)
• Guillermo Sapiro (Duke)
• Shihab Shamma (Maryland)
• Eero Simoncelli (New York University)
• Jean-Jacques Slotine (MIT)
• Michael Unser (EPFL)
• Martin Vetterli (EPFL)
• Irène Waldspurger (CNRS and Dauphine)
• Bin Yu (Berkeley)

Officially launched in November 2018 on the occasion of the 60th anniversary of IHES, the Institute’s third fundraising campaign displayed a very ambitious goal of 50 Millions euros. Thanks to all donors’ generosity and commitment as well as to the Campaign Committee members’ involvement, chaired by Jean-Laurent Bonnafé and Philippe Camus, but also to all scientific and administrative staff of the Institute, this result has not only been achieved but exceeded. A little bit more of 55 Millions euros were collected!

The Institute could relied on loyal supporters, private or public, but also on support from new donors. Whereas this campaign has already allowed superb advances, as a brand new building on the campus or the recruiting of new scientists, some of the financing obtained will support longer term projects. IHES therefore warmly thanks all those who took part to this campaign and contributed to this remarkable result.

To celebrate this success and mark the official ending of this campaign, an event has been organized on October 24, 2022, with the support of Caisse des Dépôts, IHES major donor. Isabelle Laudier, Head of the Institut pour la recherche of Caisse des Dépôts and representative of Caisse des Dépôts at the board of IHES, was the Master of Ceremony. After an introduction of Sophie Quatrehomme, Director of Communications of the Caisse des Dépôts Group and contributions of Jean-Laurent Bonnafé, Director and Chief Executive Officer of BNP Paribas, Marwan Lahoud, Chairman of the board of IHES, the audience could enjoyed a the scientific talk given by Laure Saint-Raymond, Permanent Professor at IHES. Eric Lombard, Chief Executive Director of Caisse des Dépôts, concluded this event.

To view contributions (in French) and highlights of this evening in video.