IHES - Professors


The permanent professors at IHES, all first rate scientists, are the Institute’s DNA. Many international prizes have rewarded their remarkable contributions to scientific knowledge.
  • Dustin Clausen, mathematician

    Permanent professor since 2023, holder of the Jean-Pierre Bourguignon Chair

    Dustin Clausen specializes in algebraic K-theory, finding connections between number theory and homotopy theory. In collaboration with Peter Scholze he has recently developed condensed mathematics, a new theory of analytic geometry, combining algebra and topology.

  • Hugo Duminil-Copin

    Hugo Duminil-Copin, Mathematician

    Permanent professor since 2016

    Hugo Duminil-Copin is a probabilist. His work focuses on the mathematical branch of statistical physics. He uses ideas from probability theory to study the critical behavior of various models on networks, such as the Ising, Potts, the self-avoiding walks and the percolation models. These mathematical objects describe a number of physical phenomena (such as magnetization, polymers, material porosity, etc.) by reframing them through random trajectories, sets or graphs.

  • portrait de Maxim Kontsevich

    Maxim Kontsevich, Mathematician

    Permanent professor since 1995, holder of the AXA-IHES Chair for Mathematics

    Maxim Kontsevich belongs to a new generation of mathematicians who have been able to integrate in their area of work aspects of quantum theory, opening up radically new perspectives.

  • Julio Parra-Martinez, physicist

    Permanent Professor since 2024

    Julio Parra-Martinez is a theoretical physicist working on many topics, including quantum field theory, scattering amplitudes, gravitation, effective field theories and string theory.

  • Slava Rychkov

    Slava Rychkov, Physicist

    Permanent professor since 2017

    Slava Rychkov is a theoretical physicist developing approaches to strongly coupled quantum and conformal field theories which are not exactly solvable, with applications to high energy, statistical and condensed matter physics.

  • portrait de Laure Saint-Raymond

    Laure Saint-Raymond, Mathematician

    Permanent professor since 2021

    Laure Saint-Raymond’s work focuses mainly on the asymptotic analysis of systems of partial differential equations, in particular those governing the dynamics of gases, plasmas, and fluids.

  • Emmanuel Ullmo, mathématicien, directeur de l'IHES

    Emmanuel Ullmo, Mathematician

    Director since 2013
    The Director's Chair is supported by BNP Paribas and the Institut Pierre Lamoure

    Emmanuel Ullmo's research area is algebraic and arithmetic geometry. He graduated from École Normale Supérieure de Cachan (class of 1985) and holds a PhD in Mathematical Sciences from Université Paris-Sud (1992).

  • Ahmed-ABBES-2020

    Ahmed Abbes, Mathematician

    CNRS Research Director at IHES

    Ahmed Abbes mainly studies geometrical and cohomological properties of sheaves on varieties on perfect fields of characteristic p>0 or on p-adic fields, designed for applications in arithmetic and algebraic geometry.

  • Thierry Bodineau portrait

    Thierry Bodineau, mathematician

    CNRS Research Director at IHES

    Thierry Bodineau's work focuses on mathematical problems from statistical mechanics. He has studied, in collaboration with Bernard Derrida, stochastic processes to characterize the properties of flow in non-equilibrium systems. More recently, he has worked, with Isabelle Gallagher, Laure Saint-Raymond and Sergio Simonella, to analyze the stochastic behavior of hard sphere dynamics in the kinetic limit.

  • Ofer Gabber, mathématicien

    Ofer Gabber, Mathematician

    CNRS Research Director at IHES

    Ofer Gabber is a mathematician who contributes to various topics in algebra and algebraic geometry, such as étale cohomology, logarithmic geometry, alterations of schemes and the theory of pseudo-reductive groups.

  • Fanny Kassel

    Fanny Kassel, Mathematician

    CNRS Research Director at IHES

    Fanny Kassel studies geometric, dynamical, and spectral aspects of discrete subgroups of Lie groups. She is particularly interested in actions of discrete groups on homogeneous spaces, in relation to geometric structures on manifolds and to higher Teichmüller-Thurston theory.

  • Frank Merle -IHES

    Frank Merle, Mathematician

    CY Cergy Paris Université - IHES Chair in Analysis

    Frank Merle is studying the singularities of non-linear partial differential equations. Member at Université de Cergy-Pontoise of the CNRS "Analysis, geometry and modelization" lab (UMR 8088), his research themes that arise out of hard analysis and have an important impact on mathematical physics.­­

  • Eric Perlmutter, physicist

    CEA Research Director at IHES

    Eric Perlmutter works on understanding the space and properties of conformal field theories in diverse dimensions, and their profound connections to quantum gravity via the AdS/CFT Correspondence.

  • photo Jérémie Szeftel

    Jérémie Szeftel, mathematician

    CNRS Research Director, visiting IHES

    Jérémie Szeftel, CNRS Research Director at the Jacques-Louis Lions Laboratory of Sorbonne University, specializes in nonlinear partial differential equations, and more particularly in the equations of general relativity and the phenomenon of finite time explosion.

  • Cédric Villani portrait

    Cédric Villani, mathematician

    IHES-Université de Lyon chair in Analysis

    Cédric Villani's research focuses on the study of partial differential equations and their applications to physics, particularly to statistical physics and optimal transport theory.

Find the former CNRS/CEA research directors and associate professors

  • portrait de Clément Delcamp

    Clément Delcamp

    Junior Professor in Theoretical Physics since 2023

    Clément Delcamp is a theoretical physicist working on topics at the interface of condensed matter theory and algebraic topology. His current research focuses on leveraging our knowledge of topological field theory to investigate the concepts of symmetry and duality within quantum lattice models.

  • Portrait Yilin Wang

    Yilin Wang, Mathematician

    Junior Professor in Mathematics since 2022

    Yilin Wang is working on topics at the interface of Complex analysis and Probability theory. Her current research focuses on themes that aim at enlightening the connections among Random conformal geometry, Geometric function theory, and Teichmüller theory.

  • portrait Jean-Pierre Bourguignon, ancien directeur de l'IHES

    Jean-Pierre Bourguignon, Mathematician

    IHES Director 1994-2013
    Nicolaas Kuiper honorary professor at IHES since 2013

    Jean-Pierre Bourguignon holds an engineering degree from École Polytechnique (year group 1966) and a Ph.D. in mathematical sciences from University Paris 7 (1974). His field of predilection is differential geometry, particularly in its relations with partial differential equations and mathematical physics.

  • Alain Connes (IHES)

    Alain Connes, Mathematician

    Léon Motchane Chair holder since 1979
    Emeritus College de France professor since 2017

    After pioneering contributions on operator algebras, Alain Connes developed an ambitious programme aimed at founding a "noncommutative geometry".

  • photo Thibault Damour

    Thibault Damour, Physicist

    Permanent professor 1989-2022
    Emeritus professor since 2022

    Thibault Damour is a theoretical physicist who works on Einstein's general relativity theory, cosmology and the new gravitation concepts suggested by the unification of general relativity and quantum theory defined by string theory.

  • portrait professeur Mikhail Gromov

    Mikhail Gromov, Mathematician

    Permanent professor 1982-2015
    Emeritus professor since 2015

    Mikhail Gromov has totally reshaped geometry, by showing how important it was to take into account systematically and in their entirety objects less regular than those normally considered by geometers.

  • portrait David Ruelle

    David Ruelle, Physicist

    Permanent professor 1964-2000
    Emeritus professor since 2000

    David Ruelle has proved a structure theorem about a class of polynomials which appear in the well-known Circle Theorem of Lee and Yang. Otherwise, he has worked mainly on the problem of linear response in differentiable dynamics, and its applications to nonequilibrium statistical mechanics.

  • portrait professeur Christophe Soulé

    Christophe Soulé, Mathematician

    CNRS Research Director at IHES (1986-2016)
    Emeritus CNRS professor since 2017

    Christophe Soulé studies Arakelov theory of arithmetic surfaces.

  • Jean Bourgain

    Jean Bourgain, Mathematician

    Permanent professor at IHES from 1985 to 1995

    Jean Bourgain was awarded the Fields Medal in 1994. He mainly worked on ergodic theory and partial differential equations. After leaving IHES, he held a position at the Institute for Advanced Study in Princeton, until his death in 2018. Jean Bourgain was elected foreign associate of the French Academy of Sciences in April 2000 and in 2016 he was awarded the Antonio Feltinelli prize by the Italian Accademia Nazionale dei Lincei.

  • Pierre Deligne

    Pierre Deligne, Mathematician

    Permanent professor at IHES from 1970 to 1984

    Pierre Deligne continued the work on algebraic geometry initiated by Alexander Grothendieck. A deep understanding of the role cohomology theories play in the study of algebraic varieties is due to him.

  • Jean Dieudonné

    Jean Dieudonné, Mathematician

    Permanent professor at IHES between 1958 and 1964

    Jean Dieudonné was a specialist in group theory, topology and functional analysis. He was the great “scribe” of French mathematics, writing the works of Bourbaki and Grothendieck.

  • Jürg Fröhlich

    Jürg Fröhlich, Physicist

    Permanent professor at IHES from 1978 to 1982

    Jürg Fröhlich works on quantum field theory (including axiomatic quantum field theory, conformal field theory, and topological quantum field theory), on the precise mathematical treatment of models of statistical mechanics, on theories of phase transition, on the fractional quantum Hall effect, and on non-commutative geometry.

  • Alexandre Grothendieck

    Alexand­er Grothendieck, Mathematician

    Permanent professor at IHES from 1958 to 1970

    Alexander Grothendieck set the framework for modern algebraic geometry, which is now universally adopted. His work was further amplified by Pierre Deligne, originally his disciple, who was recruited to IHES at the age of 26 and is now established at the Institute for Advanced Studies (IAS) in Princeton. Thanks to these new tools, it was possible to bring algebraic geometry and number theory together in a decisive way. He wrote the first four chapters of the famous “Éléments de Géométrie Algébrique” with Jean Dieudonné from 1960 to 1967.

  • Ancien professeur permanent Laurent Lafforgue

    Laurent Lafforgue, Mathematician

    Permanent professor from 2000 to 2021

    Laurent Lafforgue became a mathematician mainly through the study of the new algebraic functorial geometry that Alexander Grothendieck created at the end of the 1950s and that he developed at IHES with his collaborators and students.

  • Oscar Lanford III

    Oscar E. Lanford III, Physicist

    Permanent professor at IHES from 1982 to 1989

    Oscar E. Lanford III was a professor at the University of Berkeley before joining IHES. He studied how - irreversible - macroscopic evolutions can be deduced from certain - reversible - microscopic models.

  • Louis Michel

    Louis Michel, Physicist

    Permanent professor at IHES between 1962 and 1992

    Louis Michel worked on the symmetry of the laws of nature, on particle theory, and on the unification of fundamental interactions. Louis Michel was, like Eugene Wigner, one of the great promoters of the use of group theory in physics, both in the theory of elementary particles and in crystallography.

  • Portrait Léon Motchane

    Léon Motchane, mathematician

    Founder of IHES
    IHES Director from 1958 to 1971

    Léon Motchane was born in Russia in 1900. He studied in Lausanne, Switzerland, before becoming a physician assistant in a laboratory. He arrived in France in 1924 and left the academic world for the business world. Fascinated by mathematics and physics, Léon Motchane continued his education in mathematics at the age of 54 and obtained his thesis under the supervision of Gustave Choquet.

  • Nikita Nekrassov

    Nikita Nekrasov, Physicist

    Permanent professor at IHES from 2000 to 2013

    Nikita Nekrasov received his PhD from Princeton University in 1996. A physicist, he is best known for his works at the interface of gauge theories and string theory and on modern mathematical physics, thus enriching all these areas of research.

  • Vasily Pestun, Physicist

    Permanent professor at IHES from 2014 to 2023

    Vasily Pestun is a theoretical physicist who works in the field of quantum field theory and string theory, researching the dynamics of strongly interacting supersymmetric gauge theories and conformal field theories in various dimensions.

  • René Thom

    René Thom, Mathematician

    Permanent professor at IHES from 1963 to 1990

    René Thom covered a huge area of science: starting from topology, the field of mathematics that looks at forms and deformations, he created the “mathematics of morphogenesis”, putting forward models for biology and human sciences.

  • Dennis Sullivan

    Dennis Sullivan, Mathematician

    Permanent professor at IHES from 1974 to 1997

    Dennis Sullivan, an American mathematician, split his research activities between the US and France for years. A topologist, specialised in dynamics, he had a rare gift for promoting exchanges among researchers and motivating them to reach new heights in their thinking.