Conferences - Seminars

  13:00-14:00 GR A3 30

Unlike lattices in higher rank, lattices of simple Lie groups in rank 1 are not rigid. This gives rise to the Teichmüller spaces for example. For representations of lattices of the isometry group of the complex hyperbolic lattices in Hermitian Lie groups, the Kähler form yields a numerical invariant, the Toledo number. When this number ... Read more about "Maximal representations of complex hyperbolic lattices in infinite dimension."
By Bruno Duchesne (Nancy)
  08:00-18:00 GA 3 21

An incentive to use coarse-grained models is to use them for inference and control instead of the original (often intractable) model. Since coarse-grained models are always “wrong”, questions such as inference under model misspecification or goal-oriented uncertainty quantification (e.g. for control) come into play. This workshop will address such topics, with a special focus on ... Read more about "Big data and uncertainty quantification: statistical inference and information-theoretic techniques applied to computational chemistry"
By Carsten Hartmann, BTU Cottbus-Senftenberg Fabio Nobile, EPFL Frank Pinski, University ...
  10:15-11:15 MA A1 12

The Dold-Thom theorem is a classical result in algebraic topology giving isomorphisms between the homology groups of a space and the homotopy groups of its infinite symmetric product. The goal of this talk is to outline a new proof of this theorem, which is direct and geometric in nature. The heart of this proof is ... Read more about "A new approach to the Dold-Thom theorem"
By Lauren Bandklayder
  14:15-15:15 MA B1 11

Abstract: Let us consider a quasilattice, spanned by the superposition of two hexagonal lattices in the plane, differing by a rotation of angle ß. We study bifurcating quasipattern solutions of the Swift-Hohenberg PDE, built on such a quasilattice, invariant under rotations of angle π /3. For nearly all ß, this is a small divisor problem. ... Read more about "Existence of quasipatterns in the superposition of two hexagonal periodic patterns"
By Prof. Gérard IOOSS (Prof. IUF émérite, LJAD, Nice)