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.
Université Côte d'Azur, Université de Nice - Sophia Antipolis, Laboratoire de Mathématiques J. A. Dieudonné, UMR 7351 CNRS, 06108 Nice Cedex 02, France