Invited researchers - IHES

Invited researchers

The visitor programme represents the institute’s most important scientific activity. Each year, around 200 researchers are selected by the Scientific Council, after an application procedure. Drawn by the spontaneous and sometimes unexpected interactions that the Institute makes possible and encourages, visitors stay on average for 2.5 months.
Triennial chairs provide considerable flexibility for organising scientific activities, with the possibility of inviting collaborators and organising events, and chair holders can stay for longer periods at the Institute.

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The Schlumberger Chair for Mathematical Sciences

This chair was created in 2006 thanks to the trust and support of Schlumberger and is dedicated to topics at the interface with high technology. More information.

  • portrait Yves Barral

    Yves Barral, Theoretical Biology

    Schlumberger Chair for Mathematical Sciences

    Yves Barral works in biology, guided by the question of the links between mathematics and biology, and why these links remain confused and little explored.

  • portrait professeur Clément Mouhot

    Clément Mouhot, mathematician

    Schlumberger Chair for Mathematical Sciences

    Clément Mouhot is a professor of mathematics at the University of Cambridge. He is interested in the mathematical analysis of the foundations of statistical mechanics, at the interface of partial differential equations, probabilities, and functional inequalities.

  • professeur Pierre Raphael

    Pierre Raphael, mathematician

    Schlumberger Chair for Mathematical Sciences

    Pierre Raphael is the Herchel Smith Professor of Pure Mathematics at the Faculty of Mathematics of Cambridge.

    His research on non-linear partial differential equations aims at the description of energy concentration mechanisms and singularity formation during the propagation of non-linear waves



The Gretchen and Barry Mazur Chair

Created in 2018 by William R. Hearst III in tribute to Mazur couple, this Chair is reserved to a Professor in Mathematics.



The Alexzandria Figueroa and Robert Penner Chair

Created by Robert Penner, a mathematician and invited researcher for more than 25 years, the Alexzandria Figueroa and Robert Penner Chair enables one to receive a high-caliber mathematician. More information.

  • portrait professeur Gérard Ben Arous

    Gérard Ben Arous, mathematician

    Alexzandria Figueroa and Robert Penner Chair since 2023

    Gérard Ben Arous is a professor of mathematics at the Courant Institute of Mathematical Sciences at New York University and a specialist in probability theory and its applications.



Israel Gelfand Chair in mathematics

The Israel Gelfand Chair was created in 2014 in honour of the great mathematician. It symbolises scientific excellence and the sharing of knowledge, two of the Institute’s fundamental values. Israel Gelfand himself came to IHES more than ten times to carry out his research. Since 2024, Israel Gelfand Chair is supported by Squarepoint Foundation. More information.

  • portrait professeur Dennis Gaitsgory

    Dennis Gaitsgory, mathematician

    Israel Gelfand Chair of Mathematics, funded by the Squarepoint Foundation

    Dennis Gaitsgory is a professor of mathematics at Max-Planck-Institute for Mathematics, Bonn, known for his research on the geometric Langlands program.

  • portrait Takeshi Saito

    Takeshi Saito, mathematician

    Israel Gelfand Chair in mathematics, funded by Squarepoint Foundation

    Takeshi Saito, professor of mathematics at the University of Tokyo, is an expert in arithmetic geometry, known especially for his fundamental contributions to ramification theory of local fields and I-adic sheaves, étale cohomology, and Galois representations.



Louis Michel Chair for Theoretical Physics

The Louis Michel Chair for Theoretical Physics was created in 2000 in honour of Louis Michel, permanent professor in physics from 1962 to 1992. More information.

  • portrait professeur Anton Kapustin

    Anton Kapustin, physicist

    Louis Michel Chair

    Anton Kapustin is a theoretical physicist at the California Institute of Technology. He is interested in quantum field theory in general, with applications to particle physics and condensed matter theory.

  • Dam Thanh Son, Physicist

    Louis Michel Chair

    Dam Thanh Son is a Professor of Physics at the University of Chicago. He is interested in a wide range of problems in theoretical physics, including the fractional quantum Hall effect, physics of the quark/gluon plasma, gauge/gravity duality, physics of cold atom, and other topics.



René Thom Chair

Created in 2013 in honour of René Thom, a mathematician and permanent professor at IHES from 1963 to 1990, this chair supports a researcher working on theoretical biology.

Name Date Research field
Bogachev Nikolay
University of Toronto
from 07/07/2025
to 23/08/2025
Mathématiques
discrete subgroups of Lie groups, geometric topology, geometric group theory
Asadollahi Javad
University of Isfahan
from 21/07/2025
to 01/10/2025
Mathématiques
Representation Theory of Algebra
Kobayashi Toshiyuki
The University of Tokyo
from 21/07/2025
to 28/09/2025
Mathématiques
Representation Theory, Discontinuoug Groups
Smirnov Andrey
University of North Carolina
from 21/07/2025
to 22/08/2025
Mathématiques
Enumerative geometry, representation theory, mathematical phyisics, number theory
Habib Georges
Lebanese University
from 21/07/2025
to 21/08/2025
Mathématiques
Differential Geometry, Analysis on manifolds, foliations theory, Functionnal analysis
Tangue Ndawa Bertuel
University of Ngaoundere
from 21/07/2025
to 03/10/2025
Mathématiques
Dynamical System, Symplectic Geometry and their applications.
Bakhtin Yuri
Courant Institute of Mathematical Sciences
from 27/07/2025
to 03/08/2025
Mathématiques
random dynamics, probabilistic models of mathematical physics
Kobayashi Shinichi
Kyushu University
from 27/07/2025
to 30/09/2025
Mathématiques
Number theory, Iwasawa Theory, Galois representations, elliptic curves
Stein Leo
University of Mississippi
from 28/07/2025
to 03/08/2025
Physique
Gravitation, especially the black hole binary problem, both analytically and numerically
Speh Birgit
Cornell University
from 28/07/2025
to 09/08/2025
Mathématiques
Representation theory of semi simple Lie groups
Nekrasov Nikita
Simons Center for Geometry and Physics
from 01/08/2025
to 31/08/2025
Physique
String Theory
Thaler Jesse
Massachusetts Institute of Technology
from 01/08/2025
to 31/07/2026
Physique
Theoretical Particle Physics
Abiodun Oluwakemi
First Technical University
from 04/08/2025
to 28/09/2025
Mathématiques
Mathematical Modeling, Epidemiology, Numerical Analysis, Biomathematics
Headrick Matthew
Brandeis University
from 10/08/2025
to 30/08/2026
Physique
Mathematical physics. String theory.
Burungale Ashay
UT Austin
from 18/08/2025
to 17/10/2025
Mathématiques
Number theory
Romo Mauricio
Yau Mathematical Sciences Center
from 23/08/2025
to 31/08/2025
Mathématiques
Zhang Mingjia
Princeton University
from 25/08/2025
to 14/09/2025
Mathématiques
Arithmetic Algebraic Geometry
Seraj Ali
Universite Libre de Bruxelles
from 01/09/2025
to 18/10/2025
Physique
Gravitational waves, black hole physics, gravitatinoal symmetries and conservation laws
Troubat Roméo
Institut de Recherche Mathématique Avancée, Université de Strasbourg
from 01/09/2025
to 31/08/2027
Mathématiques
Pseudo-Riemannian geometry and discrete subgroups of Lie groups
Ingram Patrick
York University
from 01/09/2025
to 30/11/2025
Mathématiques
Arithmetic dynamics, number theory
Banerjee Sibasish
IHES
from 01/09/2025
to 31/10/2025
Mathématiques
Mathematical Physics
Moschella Ugo
Universita dell'Insubria
from 01/09/2025
to 04/10/2025
Physique
Mathematical Physics
Raphaël Pierre
University of Cambridge
from 01/09/2025
to 30/09/2025
Mathématiques
Gonzales Vilcarromero Richard Paul
Pontificia Universidad Católica del Perú
from 01/09/2025
to 31/10/2025
Mathématiques
Equivariant intersection theory, cohomology and K-theory of spherical varieties, in particular, group embeddings
Torrecillas Blas
Universidad de Almería
from 01/09/2025
to 26/09/2025
Mathématiques
Algebre non-commutative and homological algebra
He Taoran
National University of Singapore (NUS)
from 01/09/2025
to 31/08/2028
Mathématiques
General relativity, nonlinear wave equations, fluid dynamics
Gaiur Ilia
University of Geneva
from 01/09/2025
to 31/08/2027
Mathématiques
Geometry, Character Varieties, Mathematical Physics, Integrability
Shao Chengyang
University of Chicago
from 01/09/2025
to 31/08/2027
Mathématiques
Dispersive partial differential equations, harmonic analysis
Bottini Lea Elisa
University of Oxford
from 01/09/2025
to 31/08/2028
Physique
Quantum Field Theory, Symmetries, Lattice Models
Nang Philibert
Ecole Normale Supérieure
from 05/09/2025
to 05/12/2025
Mathématiques
Théorie des D-modules
Wolf Lasse Lennart
Paderborn University
from 06/09/2025
to 31/08/2027
Mathématiques
Geometry, functional analysis, Lie groups, symmetric spaces, discrete subgroups, Anosov representations
Gongopadhyay Krishnendu
Indian Institute of Science Education and Research (IISER) Mohali
from 06/09/2025
to 31/12/2025
Mathématiques
Hyperbolic geometry, geometric group theory, Reversibility in geometry.
Saito Takeshi
School of Sciences, the University of Tokyo
from 07/09/2025
to 04/10/2025
Mathématiques
Arithmetic geometry
Bini Donato
Istituto per le Applicazioni del Calcolo
from 07/09/2025
to 21/09/2025
Physique
General Relativity
Bessonov Nikolay
Institute of Problems in Mechanical Engineering
from 08/09/2025
to 08/12/2025
Biologie
Mathematical modelling in biology, Computational biology, mechanics, and physics
Yu Matthew
University of Oxford
from 08/09/2025
to 21/09/2025
Physique
Generalized symmetries, category theory, quantum field theory, algebraic topology
Dam Thanh Son
University of Chicago
from 14/09/2025
to 04/10/2025
Physique
Theoretical physics
Benevedes Sean
Massachusetts Institute of Technology
from 29/09/2025
to 11/10/2025
Physique
Machine learning and statistical inference for particle physics. Model building and phenomenology.
A'Campo Lambert
Max Planck Institute for Mathematics in Bonn
from 01/10/2025
to 30/09/2027
Mathématiques
Number Theory, Galois Representations, Locally Symmetric Spaces, Motives
Todjihounde Leonard
Institut de Mathematiques et de Sciences Physiques (IMSP)
from 01/10/2025
to 31/10/2025
Mathématiques
Structures et Analyse Géométriques
Koshevoy Gleb
IITP RAS
from 01/10/2025
to 01/02/2026
Mathématiques
Combinatoire
Holzschuh Tim
Ruprecht-Karls-Universität Heidelberg
from 01/10/2025
to 30/09/2026
Mathématiques
Anabelian Geometry, Arithmetic Homotopy Theory
Berean-Dutcher Jonah
University of British Columbia
from 13/10/2025
to 14/12/2025
Physique
Quantum Field Theory and Scattering Amplitudes
Sadeghi Khouzani Somayeh
Institute for Research in Fundamental Sciences (IPM)
from 15/10/2025
to 31/01/2026
Mathématiques
Representation Theory of Algebras
Usseglio Davide
Scuola Superiore Meridionale (SSM)
from 01/11/2025
to 31/10/2027
Physique
Gravitational wave physics
Denisov Sergey
UW-Madison
from 01/11/2025
to 01/12/2025
Mathématiques
Analysis and PDE
Nagar Alessandro
INFN, Sezione di Torino
from 01/11/2025
to 30/11/2025
Physique
General Relativity, Gravitational Waves
Goswami Souvik
University of Barcelona
from 01/11/2025
to 30/11/2025
Mathématiques
Algebraic cycles, Hodge theory, Arakelov geometry.
Bini Donato
Istituto per le Applicazioni del Calcolo
from 02/11/2025
to 15/11/2025
Physique
General Relativity
Ghosh Saptaswa
Indian Institute of Technology Gandhinagar
from 03/11/2025
to 14/11/2025
Physique
High Energy Physics Theory
Vlassopoulos Ioannis
Athena Research Center
from 10/11/2025
to 20/12/2025
Mathématiques
Mathematical Language modeling and Machine Learning, Non-Commutative Geometry
Huang Pengfei
Max Planck Institute for Mathematics in the Sciences
from 20/11/2025
to 20/12/2025
Mathématiques
Algebraic geometry, differential geometry, and mathematical physics
Kim Inkang
KIAS
from 01/12/2025
to 31/01/2026
Mathématiques
Geometrie hyperbolique
Darbinyan Arman
University of Southampton
from 04/12/2025
to 04/01/2026
Mathématiques
Geometric group theory, computability theory, theoretical computer science
Kim Kihyun
Seoul National University
from 14/12/2025
to 28/01/2026
Mathématiques
Partial differential equations, nonlinear dispersive equations
Onn Uri
The Australian National University
from 15/12/2025
to 16/01/2026
Mathématiques
representation theory, asymptotic group theory, p-adic groups, special functions
Sharygin Georgy
Moscow State University
from 01/01/2026
to 08/02/2026
Mathématiques
Mathématiques, géometrie non-commutative, topologie algébrique
Temkin Michael
Hebrew University
from 05/01/2026
to 28/02/2026
Mathématiques
algebraic geometry, non-archimedean geometry
Saponov Pavel
National Research University Higher School of Economics, faculty of mathematics
from 05/01/2026
to 05/02/2026
Mathématiques
quantum algebra, integrable systems
Yu Nina
Xiamen University
from 12/01/2026
to 10/02/2026
Physique
Vertex Operator Algebra, Mathematical Physics
Sun Kaiwen
University of Science and Technology of China
from 12/01/2026
to 10/02/2026
Physique
conformal field theory, supersymmetric gauge theory, topological string theory, modular form
Chervov Alexander
Institute Theoretical Experimental Physics
from 03/02/2026
to 28/06/2026
Mathématiques
Machine learning, representation theory, Langlands correspondence
Flamm Xenia Lorena
Ihes
from 01/03/2026
to 31/10/2026
Mathématiques
Discrete subgroups of Lie groups, higher Teichmüller theory and its relation to geometric structures
Garcia-Prada Oscar
ICMAT- Consejo Superior de Investigaciones Cientificas
from 16/03/2026
to 15/06/2026
Mathématiques
Complex algebraic geometry, differential geometry and math. physics
Katz Emanuel
Boston University
from 01/04/2026
to 30/06/2026
Physique
Quantum Theory
Nakanishi Kenji
Osaka University
from 01/04/2026
to 30/06/2026
Mathématiques
Esnault Hélène
Freie Universität Berlin
from 13/04/2026
to 12/07/2026
Mathématiques
Soibelman Alexander
.IHES
from 23/04/2026
to 31/08/2026
Mathématiques
Algebraic geometry, representation theory
Soibelman Yan
Kansas State University
from 23/04/2026
to 31/08/2026
Mathématiques
Algebraic Geometry, Symplectic Geometry, Mathematical Physics
Xu Yujie
Columbia University
from 30/04/2026
to 30/06/2026
Mathématiques
Number Theory, Arithmetic Geometry, and Representation Theory
Arunachalam Umamaheswaran
SASTRA DEEMED UNIVERSITY
from 01/05/2026
to 30/06/2026
Mathématiques
Algebra, Homological Algebra, Representation Theory, and Number Theory
Zaboronski Oleg
Department of Mathematics, University of Warwick
from 04/05/2026
to 26/06/2026
Mathématiques
Probability theory, interacting particle systems, random matrices, mathematical physics
Chekhov Leonid
MIchigan State University
from 05/05/2026
to 26/06/2026
Mathématiques
mathematical physics, topological recursion, moduli spaces of Riemann surfaces, quantization
Matsui Hiroki
Department of Mathematical Sciences Faculty of Science and Technology, Tokushima University
from 17/05/2026
to 24/05/2026
Mathématiques
Algebraic Geometry, Category Theory, Commutative Algebra, Representation Theory
Celikbas Olgur
West Virginia University
from 17/05/2026
to 07/06/2026
Mathématiques
Homological Algebra, Commutative Algebra
Hoang Truong
Institute of mathematics, VAST
from 17/05/2026
to 07/06/2026
Mathématiques
Algebraic geometry, Computer algebra and Form proof
Goncharov Alexander
Yale University
from 01/06/2026
to 30/08/2026
Mathématiques
Arithmetic Algebraic Geometry
Raghuram Anantharam
Fordham University at Lincoln Center
from 01/06/2026
to 15/07/2026
Mathématiques
Special values of L-functions, Automorphic Forms, Cohomology of Arithmetic Groups
Kac Victor
MIT
from 08/06/2026
to 15/07/2026
Mathématiques
Algebra, Mathematical Physics
De Sole Alberto
Universita` di Roma La Sapienza
from 15/06/2026
to 15/07/2026
Mathématiques
Lie algebras, vertex algebras, integrable systems
Braverman Alexander
University of Toronto
from 15/06/2026
to 05/08/2026
Mathématiques
Representation theory, algebraic geometry, mathematical physics
Kapustin Anton
California Institute of Technology
from 20/06/2026
to 15/08/2026
Physique
Mathematical physics (quantum field theory and condensed matter)
Smith Graham
Pontifícia Universidade Católica do Rio de Janeiro
from 01/01/2027
to 31/03/2027
Mathématiques
Geometric Analysis
Name Visit dates
Barral Yves
Titulaire Chaire Schlumberger
ETH

Biologie
Biochimie
17/06/2025 - 19/07/2025

barral(a)ihes.fr
Board 1N10 (26642)
Filip Simion
University of Chicago

Mathématiques
Studying Dynamical Systems and their connections to Geometry
27/06/2025 - 20/07/2025

sfilip(a)ihes.fr
Board 1E2 (26649)
Tsymbaliuk Oleksandr
Purdue University

Mathématiques
Representation theory, mathematical physics
05/06/2025 - 24/07/2025

tsymbaliuk(a)ihes.fr
Board 0S4 (26647)
With the support of Friends of IHES
Dam Thanh Son
Chaire Louis Michel
University of Chicago

Physique
Theoretical physics
23/06/2025 - 25/07/2025

dtson(a)ihes.fr
Board BAML5 (26704)
Chaire Louis Michel
Panfilov Alexander
Department of Physics and Astronomy (WE05) Gent University

Autre
cardiac mathematical modelling (thus Physics, Mathematics and Biology)
28/04/2025 - 26/07/2025

panfilov(a)ihes.fr
Board 1N2 (26637)
With the support of the Simons Foundation Biology Fund
Valeri Daniele
Università degli Studi di Roma La Sapienza

Mathématiques
Representation theory and mathematical physics
23/06/2025 - 26/07/2025

valeri(a)ihes.fr
Board 1E11 (26695)
Hacking Paul
University of Massachusetts, Amherst

Mathématiques
Algebraic geometry, Symplectic geometry, Mirror symmetry
30/06/2025 - 26/07/2025

hacking(a)ihes.fr
Board 1N13 (26675)
Howe Sean
University of Utah

Mathématiques
Number theory, automorphic forms, and p-adic geometry
15/07/2025 - 27/07/2025

howe(a)ihes.fr
Board BAML3 (26702)
Kaufmann Ralph
Purdue University

Mathématiques
Algebraic Geometry, Algebraic Topology, Mathematical Physics
02/06/2025 - 31/07/2025

kaufmann(a)ihes.fr
Board 0S6 (26627)
Chaire Pierre Bonelli
Kaufmann Erika
Purdue University

Mathématiques
Mathematical Physics
02/06/2025 - 31/07/2025

ekaufmann(a)ihes.fr
Board BAML2 (26701)
Avec le soutien de la Fondation ENGIE
Berenstein Arkady
University of Oregon

Mathématiques
Representation theory, quantum groups, cluster algebras, positive geom
10/06/2025 - 31/07/2025

arkadiy(a)ihes.fr
Board 1S10 (26665)
Avec le soutien d'Airbus Group
Retakh Vladimir
Rutgers University

Mathématiques
Non-commutative algebra, birational geometry
05/06/2025 - 31/07/2025

vretakh(a)ihes.fr
Board 1S10 (26665)
Keel Sean
University of Texas

Mathématiques
Geometry
30/06/2025 - 01/08/2025

keel(a)ihes.fr
Board 0E2 (26651)
With the support of Friends of IHES
Khan Adeel
Academia Sinica

Mathématiques
algebraic geometry
15/07/2025 - 04/08/2025

khan(a)ihes.fr
Board 0S8 (26610)
Varchenko Alexander
The University of North Carolina

Mathématiques
Mathematical Physics
10/07/2025 - 10/08/2025

varchenko(a)ihes.fr
Board BAML7 (26706)
Biswal Rekha
National Institute of Science Education and Research, Bhubaneswar, India.

Mathématiques
Representation theory of Kac-Moody algebras, Enveloping algebras, Macd
18/07/2025 - 19/08/2025

biswal(a)ihes.fr
Board BAML8 (26707)
Sun Zhe
University of Science and Technology of China

Mathématiques
Higher Teichmüller Theory
23/06/2025 - 20/08/2025

sun.zhe(a)ihes.fr
Board 1E6 (26648)
With the support of the KC Wong Education Foundation
Perlmutter Eric
IPhT

Physique
04/09/2023 - 30/08/2025

perl(a)ihes.fr
Board 1N12 (26674)
Goncharov Alexander
Yale University

Mathématiques
Arithmetic Algebraic Geometry
02/06/2025 - 31/08/2025

sasha(a)ihes.fr
Board 0E4 (26686)
Soibelman Yan
Kansas State University

Mathématiques
Algebraic Geometry, Symplectic Geometry, Mathematical Physics
23/09/2024 - 21/09/2025

soibel(a)ihes.fr
Simons Sabbatical Support
Soibelman Alexander
.IHES

Mathématiques
Algebraic geometry, representation theory
02/01/2025 - 21/09/2025

(a)ihes.fr
Penner Robert
Titulaire Chaire Schlumberger
California Institute of Technology

Mathématiques
Geometry, physics, biology
23/05/2025 - 31/08/2026

rpenner(a)ihes.fr
Board 1N9 (26641)
Chaire Schlumberger pour les sciences mathématiques
Szeftel Jérémie
CNRS-Laboratoire Jacques-Louis Lions

Mathématiques
02/09/2022 - 31/08/2027

szeftel(a)ihes.fr
Board 0N9 (26620)