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

    The 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

  • Robert C. Penner

    Robert C. Penner, mathematician

    The Schlumberger Chair for Mathematical Sciences

    Robert C. Penner is Visiting Researcher at the University of California, Los Angeles.



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.

  • portrait professeur Gérard Ben Arous

    Gérard Ben Arous, mathematician

    Gretchen and Barry Mazur Chair in 2025

    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.



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.



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
Sun Zhe
University of Science and Technology of China
from 01/08/2026
to 31/08/2026
Mathématiques
Higher Teichmüller Theory
Minasyan Ashot
University of Southampton
from 10/08/2026
to 05/09/2026
Mathématiques
Geometric and Combinatorial Group Theory
Nguenang Jean Pierre
Universté de Douala
from 20/08/2026
to 30/09/2026
Physique
Matière Condensée [Dynamique non linéaire- Transition de phase et localisation des reseaux optiques}
Xu Daxin
Morningside Center of Mathematics, Chinese Academy of Sciences
from 23/08/2026
to 13/09/2026
Mathématiques
Algebraic geometry
Lele Celestin
University of Dschang
from 24/08/2026
to 19/11/2026
Mathématiques
Algebre, logique et applications
Nguyen Toan
Pennsylvania State University
from 25/08/2026
to 28/02/2027
Mathématiques
Analysis of PDEs and Mathematical Physics
Javanpeykar Ariyan
Radboud
from 28/08/2026
to 29/11/2026
Mathématiques
Arithmetic geometry, rational points, hyperbolicity
Guerrieri Andrea
City St George's
from 31/08/2026
to 02/10/2026
Physique
Theoretical particle physics, S-matrix bootstrap
Mouhot Clément
University of Cambridge
from 31/08/2026
to 12/09/2026
Mathématiques
Analysis of Partial Differential Equations & Mathematical Physics
Chen Mingfeng
University of Wisconsin-Madison
from 01/09/2026
to 31/08/2028
Mathématiques
Harmonic Analysis and Analytic number theory
Chan Ki Fung
The Chinese University of Hong Kong
from 01/09/2026
to 31/08/2028
Mathématiques
Algebraic geometry, Symplectic Geometry, 2d and 3d mirror symmetry, representation theory
Bouis Tess
Institute for Advanced Study
from 01/09/2026
to 30/08/2028
Mathématiques
Motivic cohomology, K-theory, p-adic Hodge theory
Torres Ethan
CERN
from 01/09/2026
to 31/08/2028
Mathématiques
String Theory, Quantum Gravity, and Field Theory
Penner Robert
California Institute of Technology
from 01/09/2026
to 31/08/2027
Mathématiques
Geometry, physics, biology
Garkusha Grigory
Swansea University
from 01/09/2026
to 20/09/2026
Mathématiques
Algebraic K-theory, motivic homotopy theory, algebraic geometry
Seraj Ali
Institute for Research in Fundamental Sciences (IPM), Teheran
from 01/09/2026
to 01/11/2026
Physique
Gravitational waves and black hole physics.
Berean-Dutcher Jonah
University of British Columbia
from 01/09/2026
to 19/12/2026
Physique
Quantum Field Theory and Scattering Amplitudes
Raphaël Pierre
Université de Nice Sophia-Antipolis
from 01/09/2026
to 30/09/2026
Mathématiques
Deng Yu
University of Chicago
from 05/09/2026
to 12/09/2026
Mathématiques
Mathematics/PDEs
Schwartz Richard
Brown University
from 06/09/2026
to 30/11/2026
Mathématiques
Geometry
Bini Donato
Istituto per le Applicazioni del Calcolo
from 07/09/2026
to 21/09/2026
Physique
General Relativity
Samokhin Alexandre
Bielefeld University
from 07/09/2026
to 07/11/2026
Mathématiques
Théorie des représentations, géométrie algébrique
Goswami Souvik
Indian Institute of Science Education and Research (IISER).
from 08/09/2026
to 06/12/2026
Mathématiques
Algebraic cycles, Hodge theory, Arakelov geometry.
Saito Takeshi
School of Sciences, the University of Tokyo
from 13/09/2026
to 19/09/2026
Mathématiques
Arithmetic Geometry
Zheng Weizhe
AMSS, Chinese Academy of Sciences
from 13/09/2026
to 28/09/2026
Mathématiques
géométrie algébrique
Ulmer Jakob
Université Sorbonne Paris Nord
from 14/09/2026
to 12/12/2026
Mathématiques
Physical Mathematics
He Yin-Chen
Perimeter Institute for Theoretical Physics
from 14/09/2026
to 28/11/2026
Physique
Condensed matter theory and conformal field theory
Rufrano Aliberti Sara
Scuola Superiore Meridionale
from 14/09/2026
to 25/10/2026
Physique
General Relativity, Gravitational Wave Physics, Post-Newtonian theory and calculationsivity ivity
Mieda Yoichi
Graduate School of Mathematical Sciences, the University of Tokyo
from 15/09/2026
to 16/10/2026
Mathématiques
Number Theory
Koyama Shin-Ya
Toyo University
from 15/09/2026
to 15/11/2026
Mathématiques
Number Theory
Tsuji Takeshi
Graduate School of Mathematical Sciences, The University of Tokyo
from 19/09/2026
to 25/09/2026
Mathématiques
Number Theory, Arithmetic Geometry
Muddu Venkata Sai Saketh
International Center for Theoretical Sciences (ICTS-TIFR), Bengaluru, India
from 19/09/2026
to 03/10/2026
Physique
Gravitational waves, Effective field theory, Tidal response, etc.
Monien Hartmut
University Bonn
from 21/09/2026
to 16/10/2026
Mathématiques
Belyi maps of sporadic groups, non-congruence subgroups
Liu Bingyuan
The University of Texas Rio Grande Valley
from 28/09/2026
to 28/11/2026
Mathématiques
Complex Geometry and Several Complex Variables
Ghosh Kausik
King's College London
from 01/10/2026
to 30/09/2028

Conformal Field Theory
Maggio Sara
Bonn University, BCTP
from 01/10/2026
to 30/09/2028
Mathématiques
algebraic geometry, number theory
Turbiner Alexander
Instituto de Ciencias Nucleares, UNAM
from 01/10/2026
to 30/11/2026
Physique
Theoretical and Mathematical Physics
Van Order Jeanine
Pontifícia Universidade Católica do Rio de Janeiro
from 01/10/2026
to 30/11/2026
Mathématiques
Number theory, automorphic forms, arithmetic geometry
Burelle Jean-Philippe
Université de Sherbrooke
from 01/10/2026
to 15/10/2026
Mathématiques
higher Teichmüller theory, character varieties, representations of discrete groups
Marshakov Andrei
Igor Krichever Center for Advanced Studies, Skoltech
from 01/10/2026
to 01/11/2026
Physique
Mathematical Physics
Castet Nathan
Ecole Polytechnique
from 01/10/2026
to 30/09/2028
Physique
Physique théorique
Oludoun Olajumoke
Bowen University, Iwo, Osun State, Nigeria
from 05/10/2026
to 28/11/2026
Mathématiques
Mathematical biology and epidemiology(Stochastic Modelling)
Basile Thomas
UMONS
from 05/10/2026
to 05/12/2026
Physique
Higher spin gravity
Zan Bernardo
Univeristy of Genoa
from 05/10/2026
to 09/10/2026
Physique
Quantum Field Theory
Todjihounde Leonard
Institut de Mathematiques et de Sciences Physiques (IMSP)
from 06/10/2026
to 30/10/2026
Mathématiques
Structures et Analyse Géométriques
Goller Leonardo
SISSA
from 19/10/2026
to 30/09/2028
Mathématiques
Physique
Tsouvalas Konstantinos
Max Planck Institute for Mathematics in the Sciences
from 01/11/2026
to 30/11/2026
Mathématiques
Discrete subgroups of Lie groups
O'Grady Kieran Gregory
Sapienza Universita' di Roma
from 02/11/2026
to 28/11/2026
Mathématiques
Algebraic Geometry
Song Antoine
California Institute of Technology
from 02/11/2026
to 18/12/2026
Mathématiques
Géométrie différentielle, géométrie métrique, analyse géométrique
Nariman Sam
Purdue University
from 02/11/2026
to 31/01/2027
Mathématiques
Geometric topology
Vlassopoulos Ioannis
Athena Research Center
from 02/11/2026
to 18/12/2026
Mathématiques
Mathematical Language modeling and Machine Learning, Non-Commutative Geometry
Zhang Hong
Tsinghua University
from 02/11/2026
to 31/01/2027
Mathématiques
Microlocal analysis, scattering theory, and the Fractal Uncertainty Principle
Bini Donato
Istituto per le Applicazioni del Calcolo
from 09/11/2026
to 20/11/2026
Physique
General Relativity
Du Wenkui
Hunan University
from 15/11/2026
to 15/01/2027
Mathématiques
Geometric analysis (mean curvature flow, ricci flow, minimal surfaces, allen cahn equations, geometric inverse problems)
Baklouti Ali
Faculté des Sciences de Sfax
from 16/11/2026
to 18/12/2026
Mathématiques
Théorie des représentations, analyse harmonique et géométrique
Marinellis Panagiotis
ShanghaiTech University
from 21/11/2026
to 13/12/2026
Physique
Theoretical Physics, High Energy Physics, Quantum Field Theory, Scattering Amplitudes, Gravitational waves, Black holes
Kowalczyk Michal
Universidad de Chile
from 01/12/2026
to 28/02/2027
Mathématiques
Analysis of PDEs
Pezzi Daniel
Johns Hopkins University
from 15/12/2026
to 15/01/2027
Mathématiques
Harmonic analysis; partial differential equations
Kadattur Vasudevan Shuddhodan
University of Notre Dame
from 18/12/2026
to 18/01/2027
Mathématiques
Arithmetic Geometry
Smith Graham
Pontifícia Universidade Católica do Rio de Janeiro
from 01/01/2027
to 31/03/2027
Mathématiques
Geometric Analysis
Rognes John
Department of Mathematics, University of Oslo
from 01/01/2027
to 31/05/2027
Mathématiques
Algebraic topology, algebraic K-theory
Sajadi Fateme
University of Toronto
from 01/01/2027
to 31/01/2027
Mathématiques
Arithmetic Geometry, Algebraic Geometry, Number Theory
Flamm Xenia Lorena
Ihes
from 01/01/2027
to 31/12/2027
Mathématiques
Discrete subgroups of Lie groups, higher Teichmüller theory and its relation to geometric structures
Goncharov Alexander
Yale University
from 01/01/2027
to 31/08/2027
Mathématiques
Arithmetic Algebraic Geometry
Garcia-Prada Oscar
ICMAT- Consejo Superior de Investigaciones Cientificas
from 04/01/2027
to 31/03/2027
Mathématiques
Complex algebraic geometry, differential geometry and math. physics
Szabo Szilard
Eotvos Lorand University
from 04/01/2027
to 15/01/2027
Mathématiques
Hodge theory, complex geometry
Sheshmani Artan
BIMSA / and MIT (IAiFi)
from 10/01/2027
to 07/03/2027
Mathématiques
Algebraic Geometry
Madengko Simo Carole
African Institute for Mathematical Sciences (AIMS)Ghana
from 10/01/2027
to 10/03/2027
Mathématiques
Symplectic Geometry and Algebraic Topology
Janssen Oliver
École Polytechnique Fédérale de Lausanne
from 18/01/2027
to 18/02/2027
Physique
Quantum gravity, effective field theory, string cosmology
Gu Chenlin
Tsinghua University
from 01/02/2027
to 31/05/2027
Mathématiques
Probability, Statistical Mechanics, PDE
Arinkin Dima
University of Wisconsin - Madison
from 01/02/2027
to 30/04/2027
Mathématiques
Algebraic Geometry
Esnault Hélène
Freie Universität Berlin
from 01/02/2027
to 12/03/2027
Mathématiques
Bessonov Nikolay
Institute of Problems in Mechanical Engineering, Russian Academy of Sciences
from 01/02/2027
to 30/04/2027
Biologie
Computational biology, mathematical modelling in biology, mechanics, and physics.
Balasubramani Sadhanandh Vishwanath
Chennai Mathematical Institute
from 01/02/2027
to 31/03/2027
Mathématiques
Combinatorics and Representation theory
Sinelshchikov Dmitry
Biofisika Institute (CSIC, UPV/EHU) and Ikerbasque Science Foundation
from 01/02/2027
to 19/02/2027
Mathématiques
differential equations
Scott Jeanne
University of Minnesota
from 01/02/2027
to 31/03/2027
Mathématiques
combinatorics and representation theory
Ikeda Yasushi
Meiji University
from 01/02/2027
to 30/03/2027
Mathématiques
Mathematical physics: quantum integrable systems, Lie algebras, and deformation quantization
Schiappa Ricardo
Instituto Superior Técnico, University of Lisbon
from 29/03/2027
to 28/05/2027
Mathématiques
Mathematical Physics
Miayoka Moussolo Brice
Université Marien Ngouabi
from 01/04/2027
to 31/05/2027
Mathématiques
Géométrie-Arithmétique, Théorie des Nombres, Cryptographie
Saito Takeshi
School of Sciences, the University of Tokyo
from 11/04/2027
to 06/06/2027
Mathématiques
Arithmetic Geometry
Odesski Alexandre
Brock University
from 12/04/2027
to 12/06/2027
Mathématiques
Mathematical Physics
Soibelman Yan
Kansas State University
from 18/04/2027
to 31/08/2027
Mathématiques
Algebraic Geometry, Symplectic Geometry, Mathematical Physics
Fontanari Claudio
University of Trento
from 01/05/2027
to 15/05/2027
Mathématiques
Algebraic geometry. Geometry of moduli spaces. Enumerative geometry.
Kaimanovich Vadim
University of Ottawa
from 03/05/2027
to 31/07/2027
Mathématiques
Dynamics and probability on geometrical and algebraic structures
Kundu Arnab
Simion Stoilow Institute of Mathematics of the Romanian Academy (IMAR)
from 24/05/2027
to 30/06/2027
Mathématiques
Motivic Homotopy Theory. Algebraic K-theory, Arithmetic Geometry, Torsors
Tsuji Takeshi
Graduate School of Mathematical Sciences, The University of Tokyo
from 30/05/2027
to 05/06/2027
Mathématiques
Number Theory, Arithmetic Geometry
Valeri Daniele
Università degli Studi di Roma La Sapienza
from 01/06/2027
to 31/07/2027
Mathématiques
Representation theory and mathematical physics
Masmoudi Nader
Courant Institute of Mathematical Science
from 01/06/2027
to 31/07/2027
Mathématiques
Lunts Valery
Indiana University
from 01/06/2027
to 15/06/2027
Mathématiques
Algebraic Geometry
Soibelman Alexander
.IHES
from 03/06/2027
to 31/08/2027
Mathématiques
Algebraic geometry, representation theory
Li Yuezhao
Leiden University
from 02/10/2027
to 16/10/2027
Mathématiques
Noncommutative geometry and its applications in condensed matter physics
Kim Inkang
KIAS
from 29/11/2027
to 29/01/2028
Mathématiques
Geometrie hyperbolique
Sharygin Georgy
Moscow State University
from 01/12/2027
to 31/01/2028
Mathématiques
Mathématiques, géometrie non-commutative, topologie algébrique
Biswal Rekha
National Institute of Science Education and Research, Bhubaneswar, India.
from 01/12/2027
to 15/01/2028
Mathématiques
Representation theory of Kac-Moody algebras, Enveloping algebras, Macdonald polynomials
Yan Pan
The University of Arizona
from 07/12/2027
to 18/12/2027
Mathématiques
Number Theory, Representation Theory, Automorphic Forms
Yassemi Siamak
Purdue University
from 13/05/2028
to 30/07/2028
Mathématiques
Representation theory of algebras
Name Visit dates
Faergeman Joakim
IAS/Princeton University

Mathématiques
Mathematics, Geometric Representation Theory
03/08/2026 - 07/08/2026

faergeman(a)ihes.fr
Board BAML11 (26711)
Wu Yunhui
Yau Mathematical Sciences Center, Tsinghua University

Mathématiques
Teichmuller theory and geometry
06/08/2026 - 10/08/2026

wuyh(a)ihes.fr
Board BAML5 (26704)
Belkale Prakash
University of North Carolina at Chapel Hill

Mathématiques
Algebraic Geometry and Representation theory
13/07/2026 - 12/08/2026

belkale(a)ihes.fr
Board BAML6 (26705)
Raskin Sam
Yale University

Mathématiques
Geometric Langlands program; representation theory; algebraic geometry
12/06/2026 - 15/08/2026

raskin(a)ihes.fr
Board 1N14 (26678)
Markarian Nikita
Université de Strasbourg

Mathématiques
Algebraic geometry, Algebraic topolgy
08/07/2026 - 29/08/2026

markarian(a)ihes.fr
Board 1E2 (26649)
Headrick Matthew
Brandeis University

Physique
Mathematical physics. String theory.
03/09/2025 - 30/08/2026

headrick(a)ihes.fr
Board 0S5 (26616)
Ferrari Frank
Université Libre de Bruxelles (ULB)

Physique
Théorie quantique des champs et des cordes, gravitation quantique, su
20/07/2026 - 30/08/2026

ferrari(a)ihes.fr
Board 0S5 (26616)
Goncharov Alexander
Yale University

Mathématiques
Arithmetic Algebraic Geometry
01/06/2026 - 30/08/2026

sasha(a)ihes.fr
Board 1N4 (26638)
Sageev Michah
Technion - ITT

Mathématiques
Geometric Group Theory
01/08/2026 - 31/08/2026

sageev(a)ihes.fr
Board 1E10 (26608)
Soibelman Alexander
.IHES

Mathématiques
Algebraic geometry, representation theory
03/06/2026 - 31/08/2026

asoibel(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
Mazáč Dalimil
IPhT

Physique
Quantum field theory and its interplay with mathematics
02/09/2025 - 31/08/2026

mazac(a)ihes.fr
Board 1N12 (26674)
Soibelman Yan
Kansas State University

Mathématiques
Algebraic Geometry, Symplectic Geometry, Mathematical Physics
24/04/2026 - 31/08/2026

soibel(a)ihes.fr
Board 1N10 (26642)
Elkhidir Asaad
University of Edinburgh

Physique
Scattering Amplitudes
03/12/2025 - 30/11/2026

elkhidir(a)ihes.fr
Board BAML12 (26710)
Simons program for Africa-based visiting researchers
Kapustin Anton
Chaire Louis Michel
California Institute of Technology

Physique
Mathematical physics (quantum field theory and condensed matter)
22/06/2026 - 15/12/2026

kapustin(a)ihes.fr
Board 1N13 (26675)
Szeftel Jérémie
CNRS-Laboratoire Jacques-Louis Lions

Mathématiques
02/09/2022 - 31/08/2027

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