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.
  • photo Thibault Damour

    Thibault Damour, Physicist

    Permanent professor since 1989

    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.

  • Hugo Duminil-Copin, Mathematician

    Permanent professor since 2016

    Hugo Duminil-Copin is a probabilist. He works on statistical mechanics models such as percolation, the Ising model, the Potts model in 2 or 3 dimensions, random walks in random environments. His research also has an impact on mathematical physics, complex analysis and combinatorics. In addition, he makes significant contributions to statistical physics. He also works on the study of stochastic models such as random walks in random environments.

  • 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.

  • Laurent Lafforgue, Mathematician

    Permanent professor since 2000

    Laurent Lafforgue works on the Langlands programme, a group of very deep conjectures which, within an arithmetic scope, link up harmonic analysis, Galois theory and algebraic geometry.

  • Vasily Pestun, Physicist

    Permanent professor since 2014

    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.

  • 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.

  • Emmanuel Ullmo, mathématicien, directeur de l'IHES

    Emmanuel Ullmo, Mathematician

    Director since 2013

    A mathematician, his area of research is algebraic geometry and arithmetic. 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, 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.

  • Cédric Deffayet, physicist

    CNRS Research Director at IHES since 2013

    Cédric Deffayet works on theoretical physics, at the interface between cosmology, gravitation (general relativity and its extensions) and high energy theoretical physics, particularly superstring theory.

  • Ofer Gabber, Mathematician

    CNRS Research Director at IHES

    Ofer Gabber continues to contribute 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 Researcher 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.

  • Jean-Pierre Bourguignon, Mathematician

    IHES Director 1994-2013. Emeritus professor since 2013, Nicolaas H. Kuiper Chair holder

    Jean-Pierre Bourguignon holds an engineering degree from École polytechnique and a PhD in mathematical sciences from University Paris 7. A differential geometer by training, he worked on the mathematical aspects of theoretical physics.

  • 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.

  • Alain Connes (IHES)

    Alain Connes, Mathematician

    Léon Motchane Chair holder since 1979
    Emeritus professor since 2017

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

  • 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.

  • Christophe Soulé, Mathematician

    CNRS Research Director at IHES
    Emeritus professor since 2017

    Christophe Soulé is studying Arakelov theory of arithmetic surfaces. Together with Henri Gillet (Chicago) he is defining patterns of complex algebraic varieties.

  • Jean Bourgain

    Jean Bourgain, Mathematician

    Permanent professor from 1985 to 1995

    He was awarded the Fields Medal. His work centred mainly on ergodic theory and partial differential equations. He is currently in post at the Institute for Advanced Study in Princeton. Jean Bourgain was elected foreign associate of the French Academy of Sciences in April 2000.

  • Pierre Deligne, Mathematician

    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, Mathematician

    Professor at IHES between 1958 and 1992

    Jean Dieudonné has published many works on group theory, topology and functional analysis. Éléments d’analyse, published in nine volumes between 1969 and 1982, is a very scholarly work containing many substantial exercises.

  • Jurg Frohlich

    Jurg Fröhlich, Physicist

    Permanent professor from 1978 to 1982

    Jurg 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, Mathematician

    Permanent professor at IHES from 1958 to 1970

    Alexandre 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.

  • Oscar Lanford III, Physicist

    Professor at IHES from 1982 to 1989

    Oscar Lanford studied how - irreversible - macroscopic evolutions can be deduced from certain - reversible - microscopic models.

  • Louis Michel, Physicist

    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. He then focused on crystallography.

  • Nikita Nekrassov

    Nikita Nekrasov, Physicist

    Permanent professor from 2000 to 2013

    A physicist, he works at the interface of gauge theories and string theory and on modern mathematical physics, thereby enriching all these areas of research.

  • René Thom

    René Thom, Mathematician

    Permanent professor from 1963 to 1990

    He 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. His proposals, often grouped under the name of “catastrophe theory”, were sometimes controversial, but elicited considerable interest from outside the scient­ific community. He spent the rest of his scientific life studying theoretical biology, but mainly Aristotelian philosophy.

  • Dennis Sullivan, Mathematician

    Permanent professor 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