Actions affines isométriques propres des groupes hyperboliques sur des espaces $\ell^{p}$ (1609.09480v2)

Abstract: We give a simple and relatively short proof of the following fact: any hyperbolic group admits a proper affine isometric action on a $\ell^p$-space for $p$ large enough. A first proof of this result was given by Guoliang Yu.