Invited & Keynote Speakers

Invited Speaker


Charles Michel Marle (Professeur honoraire à l'Université Pierre et Marie Curie, Institut Mathématique de Jussieu, Correspondant de l’Académie des Sciences, Paris, France)


Charles-Michel Marle was born in 1934; He studied at Ecole Polytechnique (1953--1955), Ecole Nationale Supérieure des Mines de Paris (1957--1958) and Ecole Nationale Supérieure du Pétrole et des Moteurs (1957--1958).
He obtained a doctor's degree in Mathematics at the University of Paris in 1968. From 1959 to 1969 he worked as a research engineer at the Institut Français du Pétrole. He joined the Université de Besançon as Associate Professor in 1969, and the Université Pierre et Marie Curie, first as Associate Professor (1975) and then as full Professor (1981). His resarch works were first about fluid flows through porous media, then about Differential Geometry, Hamiltonian systems and applications in Mechanics and Mathematical Physics. 

Actions of Lie groups and Lie algebras on symplectic and Poisson manifolds. Application to Hamiltonian systems

Abstract: I will present some tools in Symplectic and Poisson Geometry in view of their applications in Geometric Mechanics and Mathematical Physics. Lie group and Lie algebra actions on symplectic and Poisson manifolds, momentum maps and their equivariance properties, first integrals associated to symmetries of Hamiltonian systems will be discussed. Reduction methods taking advantage of symmetries will be discussed.

Bibliography :


Keynote Speakers


Marc Arnaudon (Université de Bordeaux, France)


Marc Arnaudon was born in France in 1965. He graduated from Ecole Normale Supérieure de Paris, France, in 1991. He received the PhD degree in mathematics and the Habilitation à diriger des Recherches degree from Strasbourg University, France, in January 1994 and January 1998 respectively. After postdoctoral research and teaching at Strasbourg, he began in September 1999 a full professor position in the Department of Mathematics at Poitiers University, France, where he was the head of the Probability Research Group. In January 2013 he left Poitiers and joined the Department of Mathematics of Bordeaux University,  France, where he is a full professor in mathematics.
 Prof. Arnaudon is an expert in stochastic differential geometry and stochastic calculus in manifolds, he has published over 50 articles in mathematical and physical journals.

Stochastic Euler-Poincaré reduction

Abstract: We will prove a Euler-Poincaré reduction theorem for stochastic processes taking values in a Lie group, which is a generalization of the Lagrangian version of reduction and its associated variational principles. We will also show examples of its application to the rigid body and to the group of diffeomorphisms, which includes the Navier-Stokes equation on a bounded domain and the Camassa-Holm equation.


  • M. Arnaudon, A.B. Cruzeiro and X. Chen, "Stochastic Euler-Poincaré Reduction", Journal of Mathematical Physics, to appear
  • V. I. Arnold and B. Khesin,   "Topological methods in hydrodynamics",   Applied Math. Series 125, Springer (1998).
  • J. M. Bismut,  "Mécanique aléatoire",   Lecture Notes in Mathematics,  866, Springer  (1981).
  • D.G. Ebin and J.E. Marsden,   "Groups of diffeomorphisms and the motion of an incompressible fluid",   Ann of Math.   92  (1970),  102--163.
  • J. E.  Marsden and T. S.  Ratiu, "Introduction to Mechanics and Symmetry: a basic exposition of classical mechanical systems",  Springer, Texts in Applied Math. (2003).
  • BA in Mathematics, University of Timisoara, Romania, 1973
  • MA in Applied Mathematics, University of Timisoara, Romania, 1974
  • Ph.D. in Mathematics, University of California, Berkeley, 1980
  • T.H. Hildebrandt Research Assistant Professor, University of Michigan, Ann Arbor, USA 1980-1983
  • Associate Professor of Mathematics, University of Arizona, Tuscon, USA 1983-1988
  • Professor of Mathematics, University of California, Santa Cruz, USA, 1988-2001
  • Chaired Professor of Mathematics, Ecole Polytechnique Federale de Lausanne, Switzerland, 1998 - present
  • Professor of Mathematics, Skolkovo Institute of Science and Technonology, Moscow, Russia, 2014 - present

Symmetry methods in geometric mechanics

AbstractThe goal of these lectures is to show the influence of symmetry in various aspects of theoretical mechanics. Canonical actions of Lie groups on Poisson manifolds often give rise to conservation laws, encoded in modern language by the concept of momentum maps. Reduction methods lead to a deeper understanding of the dynamics of mechanical systems. Basic results in singular Hamiltonian reduction will be presented. The Lagrangian version of reduction and its associated variational principles will also be discussed. The understanding of symmetric bifurcation phenomena in for Hamiltonian systems are based on these reduction techniques. Time permitting, discrete versions of these geometric methods will also be discussed in the context of examples from elasticity. 


  • Demoures, F., Gay-Balmaz, F., Ratiu, T.S.: Multisymplectic variational integrators and space/time symplecticity, Communications in Analysis and Applications (2015), to appear
  • Gay-Balmaz, F., Ratiu, T.S.: The geometric structure of complex fluids, Advances in Applied Mathematics, 42 (2009), 176--275  
  • Gay-Balmaz, F., Marsden, J.E., Ratiu, T.S.: Reduced variational formulations in free boundary continuum mechanics, Journ. Nonlinear Sci., 22 (2012), 463-497
  • Libermann, P., Marle, C.-M.: Symplectic Geometry and Analytical Mechanics. Symplectic Geometry and Analytical Mechanics. D. Reidel Publishing Company, Dordrecht (1987)
  • Marsden, J.E,  Ratiu, T.S.: Introduction to Mechanics and Symmetry, Texts in Applied Mathematics 17, second edition, Springer Verlag, (1998)
  • Marsden, J.E, Misiolek, G., Ortega, J.-P., Perlmutter, M.,  Ratiu, T.S.: Hamiltonian Reduction by Stages, Springer Lecture Notes in Mathematics, 1913, Springer-Verlag, New York (2007)
  • Marsden J.E, West M.: Discrete mechanics and variational integrators, Acta Numer., 10 (2001), 357–514.
  • Ortega, J.-P., Ratiu, T.S.: Momentum Maps and Hamiltonian Reduction, Progress in Mathematics 222, Birkh\"auser, Boston (2004)

Mathilde Marcolli (Caltech, USA)


  • Laurea in Physics, University of Milano, 1993
  • Master of Science, Mathematics, University of Chicago, 1994
  • PhD, Mathematics, University of Chicago, 1997
  • Moore Instructor, Massachusetts Institute of Technology, 1997-2000
  • Associate Professor (C3), Max Planck Institute for Mathematics, 2000-2008
  • Professor, California Institute of Technology, 2008-present
  • Distinguished Visiting Research Chair, Perimeter Institute for Theoretical Physics, 2013-present

From Geometry and Physics to Computational Linguistics

AbstractI will show how techniques from geometry (algebraic geometry and topology) and physics (statistical physics) can be applied to Linguistics, in order to provide a computational approach to questions of syntactic structure and language evolution, within the context of Chomsky's Principles and Parameters framework.


  • N. Chomsky, Lectures on Government and Binding, Foris, Dordrecht, 1981.
  • H. Edelsbrunner, J.L. Harer, Computational Topology: An Introduction, American Mathematical Society, 2010.
  • M. Drton, B. Sturmfels, S. Sullivant, Lectures on Algebraic Statistics, Birkhauser, 2009
  • K. H. Fischer, J. A. Hertz, Spin Glasses, Cambridge University Press, 1993.

Dominique Spehner (université Grenoble Alpes, France)


  • Diplôme d'Études Approfondies (DEA) in Theoretical Physics at the École Normale Supérieure de Lyon, 1994
  • Civil Service (Service National de la Coopération), Technion Institute of Technology, Haifa, Israel, 1995-1996
  • PhD in Theoretical Physics, Université Paul Sabatier, Toulouse, France, 1996-2000.
  • Postdoctoral fellow, Pontificia Universidad Católica, Santiago, Chile, 2000-2001
  • Research Associate, University of Duisburg-Essen, Germany, 2001-2005
  • Maître de Conférences, Université Joseph Fourier, Grenoble, France, 2005-present
  • Habilitation à diriger des Recherches (HDR), Université Grenoble Alpes, 2015
  • Member of the Institut Fourier (since 2005) and the Laboratoire de Physique et Modélisation des Milieux Condensés (since 2013) of the university Grenoble Alpes, France

Geometry on the set of quantum states and quantum correlations Short Course (Chaired by Roger Balian)


I will show that the set of states of a quantum system with a finite-dimensional Hilbert space can be equipped with various Riemannian distances having nice properties from a quantum information viewpoint, namely they are contractive under all physically allowed operations on the system. The corresponding metrics are quantum analogs of the Fisher metric and have been classified by D. Petz. Two distances are particularly relevant physically: the Bogoliubov-Kubo-Mori distance studied by R. Balian, Y. Alhassid and H.   Reinhardt, and the Bures distance studied by A. Uhlmann and by S.L.  Braunstein and C.M. Caves. The latter gives the quantum Fisher information playing an important role in quantum metrology. A way to measure the amount of quantum correlations (entanglement or quantum discord) in bipartite systems (that is, systems composed of two parties) with the help of these distances will be also discussed.


  • D. Petz, Monotone Metrics on Matrix Spaces, Lin. Alg. and its Appl.  244, 81-96 (1996)
  • R. Balian, Y. Alhassid, and H. Reinhardt, Dissipation in many-body systems: a geometric approach based on information theory, Phys. Rep.   131, 1 (1986)
  • R. Balian, The entropy-based quantum metric, Entropy 2014 16(7), 3878-3888 (2014)
  • A. Uhlmann, The ``transition probability'' in the state space of a *-algebra, Rep. Math. Phys. 9, 273-279 (1976)
  • S.L. Braunstein and C.M. Caves, Statistical Distance and the Geometry of Quantum States, Phys. Rev. Lett. 72, 3439-3443 (1994)
  • D. Spehner, Quantum correlations and Distinguishability of quantum states, J. Math. Phys. 55  (2014), 075211