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.
Absolute retracts as factors of normed linear spaces
Actions de groupes sur les -variétés non séparées et feuilletages de codimension un
Actions of the group of homeomorphisms of the circle on surfaces
We describe all the group morphisms from the group of orientation-preserving homeomorphisms of the circle to the group of homeomorphisms of the annulus or of the torus.
Algebraic Transformation Groups and Representation.
Area preserving twist homeomorphism of the annulus.