A Narasimhan-Seshardri-Donaldson Correspondance over Non-orientable Surfaces.
A note on compact groups, acting on R-trees
A note on Lie algebroids which arise from groupoid actions
A note on my paper "Notes on compact semigroups with identity".
A note on smooth toral reductions of spheres.
A note on the converse of the Lefschetz theorem for G-maps
The purpose of this note is to prove the converse of the Lefschetz fixed point theorem (CLT) together with an equivariant version of the converse of the Lefschetz deformation theorem (CDT) in the category of finite G-simplicial complexes, where G is a finite group.
A note on the location of joint discontinuity.
A Periodic Flow with Infinite Epstein Hierarchy.
A Polish AR-Space with no Nontrivial Isotopy
The Polish space Y constructed in [vM1] admits no nontrivial isotopy. Yet, there exists a Polish group that acts transitively on Y.
A split exact sequence of Mackey functors.
A splitting principle for group representations.
A sufficient condition for a group of homeomorphisms to be affine.
A Transfer Homomorphism for Compact Lie Group Actions.
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.
Abelian group actions on algebraic varieties with one fixed point.
Absolute retracts as factors of normed linear spaces
Actions cycliques libres sur les 3-Q-sphères
Actions de groupes finis sur : la conjecture de P. A. Smith
Actions de groupes sur les -variétés non séparées et feuilletages de codimension un