4-dimensional c-symplectic -manifolds with non-empty fixed point set need not be c-Hamiltonian
The aim of this article is to answer a question posed by J. Oprea in his talk at the Workshop "Homotopy and Geometry".
A classification of the topological types of -actions on closed orientable 3-manifolds
A decomposition into homeomorphic handlebodies with naturally equivalent involutions.
A free group acting without fixed points on the rational unit sphere
A note on smooth toral reductions of spheres.
A uniformly quasiconformal group not isomorphic to a Möbius group.
A vanishing theorem for twisted Alexander polynomials with applications to symplectic 4-manifolds
In this paper we show that given any 3-manifold and any non-fibered class in there exists a representation such that the corresponding twisted Alexander polynomial is zero. We obtain this result by extending earlier work of ours and by combining this with recent results of Agol and Wise on separability of 3-manifold groups. This result allows us to completely classify symplectic 4-manifolds with a free circle action, and to determine their symplectic cones.
Actions de groupes finis sur : la conjecture de P. A. Smith
Actions of Groups with Periodic Cohomology on Poincaré Duality Spaces.
Actions of the Homeotopy Group of an Orientable 3-Dimensional Handle Body.
Actions of on some surface-bundles over
Affine Actions of Higher Rank Lattices.
Almost complex toric manifolds and positive line bundles
Almost transitive actions on spaces with the rational homotopy of sphere products.
An Equivariant Lefschetz Formula for Finite Reductive Groups.
Analysis on real affine -varieties.
Analytische periodische Strömungen auf kompakten komplexen Räumen.
Area preserving group actions on surfaces.
Au bord de certains polyèdres hyperboliques
Le cadre de cet article est celui des groupes et des espaces hyperboliques de M. Gromov. Il est motivé par la question suivante : comment différencier deux groupes hyperboliques à quasi-isométrie près ? On illustre ce problème en détaillant un exemple de M. Gromov issu de Asymptotic invariants for infinite groups. On décrit une famille infinie de groupes hyperboliques, deux à deux non quasi-isométriques, de bord la courbe de Menger. La méthode consiste à étudier leur structure quasi-conforme au...
Balanced splittings of Semi-free actions of finite groups on homotopy spheres.