Itzykson Seminar – FMJH

 

Since 2012, as part of the Labex Mathematics Hadamard (LMH) activities, the Institute has been hosting the Itzykson seminar once or twice a year. The goal of this seminar is to gather a scientific community around mathematics and fundamental physics in the Saclay area, including students in master, Ph.D., or post-doctoral studies.

10th Itzykson seminar

This year, the 10th seminar will be held at the Institute on Thursday, November 17, 2022.

Organized by Maxim Kontsevich (IHES), Stéphane Nonnenmacher (IMO, Univ. Paris-Saclay), Sylvain Ribault (IPhT Saclay), and Pierre Vanhove (IPhT Saclay), it will focus on the theme of “Multiple zeta values and modular graph functions in string theory“.

During the day, three talks will be given by Pierre Vanhove (IPhT Saclay), Federico Zerbini (Oxford), and Eric Perlmutter (IPhT Saclay).

Participation is free but registration is compulsory until November 10, 2022. The seminar will be filmed and broadcast online after the event.

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!

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2022 Summer School on the Langlands program

The next Summer School, organized by Pierre-Henri Chaudouard (IMJ-PRG),  Wee Teck Gan (National Univ. of Singapore), Tasho Kaletha (Univ. of Michigan), and Yiannis Sakellaridis (Johns Hopkins Univ.), will focus on the Langlands program, an area of research still very active, for three weeks. It will be held at IHES from July 11 to 29, 2022.

Gérard Laumon (Univ. Paris-Sud), Colette Mœglin (IMJ-PRG), Bảo Châu NGÔ (Chicago Univ.) and Jean-Loup Waldspurger (IMJ-PRG) are the members of the scientific committee for this 2022 edition.

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45 years of research and more…

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.

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 geometric space, can be used to organize a lot of developments around reciprocity.

The Summer School will attempt to bring these exciting new directions together and explore their interactions.

Find out more about the invited speakers:
– David BEN-ZVI, UT Austin
– Raphaël BEUZART-PLESSIS, Univ. Aix-Marseille
– Ana CARAIANI, Imperial College
– Jean-François DAT, IMJ-PRG
– Matthew EMERTON, Chicago Univ.
– Laurent FARGUES, IMJ-PRG
– Tony FENG, MIT
– Jessica FINTZEN, Duke Univ. & Cambridge Univ.
– Toby GEE, Imperial College
– Michael HARRIS, Columbia Univ.
– Eugen HELLMANN, Univ. Münster
– Erez LAPID, Weizmann Inst.
– Chao LI, Columbia Univ.
– Lucas MASON-BROWN, University of Oxford
– Sophie MOREL, ENS Lyon
– Bảo Châu NGÔ, Chicago Univ.
– Dipendra PRASAD, IIT Bombay
– Sam RASKIN, Univ. of Texas
– Peter SCHOLZE, Univ. Bonn
– Sug Woo SHIN, UC Berkeley
– Olivier TAÏBI, ENS Lyon
– Akshay VENKATESH, IAS
– Jared WEINSTEIN, Boston Univ.
– Cong XUE, IMJ-PRG
– Zhiwei YUN, MIT
– Wei ZHANG, MIT
– Xinwen ZHU, CALTECH

More information on the dedicated webpage.

LSC, for Life, Structure, and Cognition, is a new initiative led by Yves Barral (ETH Zurich), Mikhail Gromov (IHES, University of Paris-Saclay), Robert Penner (IHES, University of Paris-Saclay), and Vasily Pestun (IHES, University of Paris-Saclay).

The goal of this event 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.

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This year the first edition of the Life, Structure, and Cognition – LSC 2022 event takes place!

For the LSC 2022, two events are scheduled:

1) LSC 2022 Webinars: there will be two webinars leading to the meeting followed by more in the Fall.

• A first webinar, given by Pierre-Yves Oudeyer (Microsoft Research Lab, Montreal & Inria Bordeaux-Ouest), will take place on May 18, 2022, who will present a research program called Development AI, which studies open-ended developmental and learning models with the goal of building machines that learn like children.
• A second webinar will be given by Eugene V. Koonin (NIH Bethesda) on June 7, 2022, and will focus on the evolution of complexity and the origins of life with its complexity.

2) LSC 2022 Meeting

The LSC 2022 Meeting is organized by Yves Barral (ETH Zurich), Mikhail Gromov (IHES & NYU), Robert Penner (IHES & UCLA), and Vasily Pestun (IHES & IBM Research), together with Nicolas Minc from the Institute Jacques Monod.

The invited guests will be:

• Yves Barral, Cellular Biology, ETH Zurich
• Consuelo De Morales, Biocommunication, ETH Zurich 
• Mikhail Gromov, Mathematical Biology, IHES & NYU
• Eugene V. Koonin, Evolutionary Genetics, National Center for Biotechnology Information, National Library of Medicine, National Institute of Health
• Yann LeCun, Computational and Biological Learning, New York University & Meta AI 
• Mark Mescher, Evolutionary Ecology, ETH Zurich 
• Nicolas Minc, Evolutionary Ecology, ETH Zurich 
• Robert Penner, Mathematical Biology, IHES & UCLA
• Vasily Pestun, Theoretical Physics, and Machine Learning, IHES & IBM Research
• Simon Townsend, Comparative Communication and Cognition, University of Zurich 
• Yukiko Yamashita, Cellular Biology, Massachusetts Institute of Technology 

The LSC 2022 (June 26 – July 1) will consist of:

• Informal exchanges among the invited guests, the LSC constitutive committee members and meeting organizers, and the scientific community at large at IHES for the full duration of the meeting.
• Hybrid Public Lectures (June 27 – 30) at the Institut Jacques Monod, Amphithéâtre Buffon (Consuelo De Moraes, Mark Mescher, Simon Townsend)

To find out more about the LSC 2022 event, and to learn more about the program, visit the dedicated web page.

After a short absence, we are happy to be able to organise again at IHES the Workshop Schlumberger. Organized by Thierry Coquand, current chairholder of the Schlumberger Chair for Mathematical Sciences, it will take place on June 15, 2022. The goal of this day will be to review recent developments in the typed lambda-calculus formalism and explore the limitations and possibilities of this approach.

Schlumberger Workshop:
Types dépendants et Formalisation des mathématiques

The formalism of typed lambda-calculus and dependent types provides a notation system not only for mathematical objects (as was the case for the formalism used by Bourbaki) but also for mathematical proofs. This formalism is accurate enough to be represented on computers, and several interactive proof verification systems are based on this approach.

This subject has known spectacular developments in the last 15 years: non-trivial proofs have been formalized, such as the 4-color theorem, the Feit-Thompson theorem, or more recently, a complex lemma of P. Scholze (liquid tensor experiment).

In another direction, an unexpected connection between this formalism and the notion of higher-order topos has been highlighted.

Registration until June 12 on the dedicated webpage.

Invited speakers:

• Benedikt Ahrens, Delft University of Technology
• Anthony Bordg, University of Cambridge
• Cyril Cohen, Inria
• Georges Gonthier, Inria
• Assia Mahboubi, Inria
• Patrick Massot, LMO, Université Paris-Saclay

Initially planned for 2020 to mark the 100th anniversary of the Ising model, the dedicated conference was finally held from May 30 to June 3, 2022, at IHES.

The Ising model is one of the most classical models of statistical physics and has been a testing ground for mathematicians and physicists for more than a century.

For the 100th (102!) anniversary of the Ising model, IHES wad pleased to host the special conference organized by Hugo Duminil-Copin (IHES), Slava Rychkov (IHES) and Béatrice de Tilière (Cérémade, Université Paris-Dauphine). These five days of talks, on subjects coming from various fields involved in the study of the model were an opportunity for scientists to exchange their views on a model that continues to fascinate and challenge them.

The conference was broadcast live online: 

List of speakers and round-table participants:

This year IHES celebrated the International Day of Women in Mathematics through an event that took place on Tuesday, May 17, at 5:30pm, both at IHES and online.

On that occasion, Indira Chatterji, professor of mathematics at the University Côte d’Azur, gave a talk entitled Institutional bias, explained by a mathematician.

In statistics, a bias is the discrepancy between the theoretical value of a variable and the observed value. For example, it is widely accepted that men and women have the same intellectual capacity regarding mathematics, but we observe that there are very few female mathematicians. On neutral examples, we will study how biases can be created.

Photographer Marie-Hélène Le Ny introduced her project Infinités Plurielles, a series of portraits of women researchers.
A selection of pictures in the series provided by Université Paris-Saclay was exhibited at IHES during the event.

This event (that took place in English) was introduced by Bertille Follain, a PhD student in mathematics at Ecole normale supérieure de Paris, laureate of the 2021 Maryam Mirzakhani Junior Prize of the Fondation Mathématique Jacques Hadamard.

This event was organized in association with the Fondation Mathématique Jacques Hadamard (FMJH).

Watch the entire event here.

MIKE FEST – 9-13 May 2022

In honor of the 60th birthday of Michael R. Douglas, a longtime supporter of IHES, a conference was held in his honor on May 9-13, 2022 at the Institute.

Michael R. Douglas, who recently stepped down as president of Friends of IHES, is a theoretical physicist known notably for his work on string theory and mathematical physics. His relationship with the IHES dates back to 2000 when he became the Louis Michel Chair of Theoretical Physics.

During five days, several international speakers will cover the topics on which Mike Douglas has worked and made profound contributions, namely: string theory, matrix models, mathematical physics, and machine learning.

To register, get more information on the MikeFest program, and stay up to date on the latest action, go to the dedicated webpage.

Replay the conference in videos:

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Organizers : 

• Costas Bachas, LPENS
• Semyon Klevtsov, Univ. Strasbourg
• Nikita Nekrasov, SCGP & Stony Brook
• Emmanuel Ullmo, IHES

Invited speakers:

• Vijay Balasubramanian, Univ. of Pennsylvania
• Alexander Belavin, Independent Univ. Moscow (TBC)
• Ilka Brunner, Univ. München
• Alain Connes, IHES & Collège de France
• Frederik Denef, Columbia Univ.
• Bartomeu Fiol, Univ. de Barcelona
• Jaume Gomis, Perimeter Institute (TBC)
• Sasha Gorsky, IITP RAS, MIPT
• Chris Hull, Imperial College
• Shamit Kachru, Stanford Univ.
• Volodya Kazakov, LPENS
• Maxim Kontsevich, IHES
• Patrick Massot, LMO – Univ. Paris-Saclay
• Luca Mazzucato*, Univ. of Oregon
• David McAllester, TTIC *
• Liam McAllister, Cornell Univ.
• Greg Moore*, Rutgers Univ.
• Rémi Monasson, LPENS
• Eliezer Rabinovici, Hebrew Univ. of Jerusalem

• John Schwarz, Caltech

• Nathan Seiberg*, IAS
• Steve Shenker*, Stanford Univ.
• Eva Silverstein*, Stanford Univ.
• Christian Szegedy, Google Research
• Washington Taylor*, MIT
• Alessandro Tomasiello, Univ. Degli Studi Di Milano Bicocca
• Josef Urban, CIIRC
• Steve Zelditch*, Northwestern Univ.

* remote talks

Veronica Fantini and Alex Takeda, both post-doctoral scientists at IHES, organize a conference “Workshop on Quantum Geometry”, from 25 to 29 April 2022, with the support of the LabEx Mathematics Hadamard.

Registration is open until 21 April, more information is on the dedicated webpage.

Advances in quantum geometry

The five-day conference will highlight recent advances in enumerative geometry, emphasizing its connection with mathematical physics and quantization.

Pierrick Bousseau, from ETH Zurich, and Hülya Argüz, from the Institute of Science and Technology Austria in Vienna, will present their recent work, also joint with Pandharipande-Zvonkine, in a mini-series of lectures. Other early-career speakers working on similar topics will also give talks on the topic.

Find out more about the guest speakers:

• Nezhla Aghaei, University of Bern
• Hülya Argüz, IST Austria
• Anna Barbieri, University of Milano Statale
• Pierrick Bousseau, ETH Zurich
• Pierre Descombes, Sorbonne Université UPMC
• Maxime Fairon, University of Glasgow
• Elba Garcia-Failde, IMJ-PRG
• Alessandro Giacchetto, IPhT
• Oscar Kivinen, EPFL
• Joshua Lam, IHES
• Mingkun Liu, IMJ-PRG
• Riccardo Ontani, SISSA
• Gabriele Rembado, Hausdorff Centre for Mathematics, Bonn
• Alexander Soibelman, IHES

To apply, get more information about the schedule, and be informed of the latest actions, visit the conference web page.

The launch of carmin.tv, a new platform for promoting and sharing scientific research took place in the presence of Sylvie Benzoni, director of IHP and scientific and technical manager of CARMIN, Christophe Ritzenthaler, director of CIMPA, Pascal Hubert, director of CIRM, and Emmanuel Ullmo, director of IHES

on Friday, December 10, 2021, from 4:00 pm
at the Institut Henri Poincaré
11, rue Pierre et Marie Curie – Paris 5e
Health pass required.

Program
4:00pm Presentation of the carmin.tv web platform by the directors of CIMPA, CIRM, IHES and IHP
4:30pm Round table
6pm Cocktail

The LabEx (Laboratory of Excellence) CARMIN (Centres d’Accueil et de Rencontres Mathématiques INternationales) federates four French institutes, at the service of research in mathematics and their interactions:
•    Centre International de Mathématiques Pures et Appliquées (CIMPA)
•    Centre International de Rencontres Mathématiques (CIRM)
•    Institut des Hautes Études Scientifiques (IHES)
•    Institut Henri Poincaré (IHP)
Designed by the four members of LabEx CARMIN (CIMPA, CIRM, IHES and IHP) to preserve and enhance their media collections, carmin.tv is a media platform dedicated to mathematics and its interactions. The idea is to make these contents accessible to all on one platform designed for the scientific community.

Damour Fest
Adventures in Gravitation

 

To celebrate the 70th birthday of Thibault Damour, permanent professor at IHES since 1989, a “Damour Fest”, gathering friends with whom he enjoys interacting around Gravitational Physics and beyond, was held at IHES from Tuesday 12 October afternoon to Friday 15 October 2021 noon. It was organised by Nathalie Deruelle (APC, Université de Paris), Alessandro Nagar (INFN Torino) and Slava Rychkov (IHES).

The following speakers talked (a few remotely) on topics of their choice reflecting their current interest:

– 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

To apply, get more information about the schedule, and be informed of the latest actions, visit the conference web page.

The conference was held in a blended form, with talks given on-site at IHES and others remotely through Zoom. All the talks could 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.

Find all the videos of the Damour Fest:

Women are still much underrepresented in mathematics and theoretical physics, particularly at IHES, where only 10% of its visitors are female. IHES, in line with Université Paris-Saclay, firmly intends to reduce that gap and attract more women researchers.

To identify the best way to do so, the Institute wishes to take advantage of the experience, hindsight and know-how of several organizations that have been created over the years to raise awareness and promote equal opportunities for women in mathematics. For decades now, female mathematicians across the world have been joining forces to encourage more women to choose STEM and to ensure that they get fair and equal treatment when they do so.

IHES thus organized a panel discussion featuring a former visiting professor at IHES as well as representatives from the Association for Women in Mathematics, that is celebrating its 50^th anniversary this year, and the European Women in Mathematics, all of whom are strong diversity and inclusion advocates.

The event took place in a hybrid format on Monday, October 4, at 6pm Paris time, both at the Marilyn and James Simons Conference Center, IHES, and online.

Panelists were: Eva Bayer-Fluckiger, Professor Emeritus at École Polytechnique Fédérale de Lausanne, Kathryn Leonard, president of the Association of Women in Mathematics, and Andrea Walther, co-convenor of the European Women in Mathematics.

By sharing their experiences and their expertise, they helped identify relevant initiatives to accompany and promote women researchers in mathematics, and ensure that they are better represented at institutions like IHES. The funds raised later on at the next Friends of IHES gala, dedicated to “Women in Fundamental Research”, will then help implement some of those initiatives at the Institute.

Click here to watch the replay

 

Eva Bayer-Fluckiger is a mathematician whose interests include algebraic number theory, Galois cohomology of algebraic groups, quadratic forms, Hermitian forms and involution algebras, knot theory, and the application of algebra and number theory to algebraic codes. During her career she was a visiting professor at IHES several times. She is currently Professor Emeritus at École Polytechnique Fédérale de Lausanne.

 

Kathryn Leonard is a mathematician and computer scientist whose research interests include geometric models for computer graphics, computer vision, and data analysis, with an emphasis on explainability. She is a professor of computer science at the Occidental College, Los Angeles, and director of the Center for Undergraduate Research in Mathematics. She has been the President of the Association for Women in Mathematics since February 2021.

 

Andrea Walther is an applied mathematician working on nonlinear optimization, non-smooth optimization, and scientific computing. She is known in particular for her work on automatic differentiation. She is professor of mathematical optimization in the institute for mathematics of Humboldt University of Berlin. She has been convenor of the European Women in Mathematics since July 2020.