output
20022013
most citedGéométrie de contact: de la dimension trois vers les dimensions supérieures

374 citations

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Showing 2004Show all

10 papers · 1 filter

math.DS2004

Sur les espaces mesures singuliers II - Etude spectrale

Mikael Pichot

We are mainly interested here in Kazhdan's property T for measured equivalence relations. Among our main results are characterizations of strong ergodicity and Kazhdan's property i…

math.DS2004

Sur les espaces mesures singuliers I - Etude metrique-mesuree

Mikael Pichot

Recall Jones-Schmidt theorem that an ergodic measured equivalence relation is strongly ergodic if and only if it has no nontrivial amenable quotient. We give two new characterizati…

math.DS2004

On Lorentz dynamics : From group actions to warped products via homogeneous spaces

Abdelouahab Arouche, Mohamed Deffaf, Abdelghani Zeghib

We show a geometric rigidity of isometric actions of non compact (semisimple) Lie groups on Lorentz manifolds. Namely, we show that the manifold has a warped product structure of a…

math.PR2004★ 1 cited

Cugliandolo-Kurchan equations for dynamics of Spin-Glasses

Gerard Ben Arous, Amir Dembo, Alice Guionnet

We study the Langevin dynamics for the family of spherical -spin disordered mean-field models and prove that in the limit of system size approaching infinity, the empirical…

math.GR2004

Some small cancellation properties of random groups

Yann Ollivier

We work in the density model of random groups. We prove that they satisfy an isoperimetric inequality with sharp constant depending upon the density parameter . This impl…

math.GR2004

Kazhdan groups with infinite outer automorphism group

Yann Ollivier, Daniel T. Wise

For each countable group we produce a short exact sequence where is f.g. and has a graphical presentation and is f.g. and satisfies…