Displaying similar documents to “Classification of 𝒜 -simple germs from k n to k 2

Orbit Structure of certain 2 -actions on solid torus

C. Maquera, L. F. Martins (2008)

Annales de la faculté des sciences de Toulouse Mathématiques

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In this paper we describe the orbit structure of   C 2 -actions of   2   on the solid torus   S 1 × D 2   having   S 1 × { 0 }   and   S 1 × D 2   as the only compact orbits, and   S 1 × { 0 }   as singular set.

How restrictive is topological dynamics?

Anzelm Iwanik (1997)

Commentationes Mathematicae Universitatis Carolinae

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Let T be a permutation of an abstract set X . In ZFC, we find a necessary and sufficient condition it terms of cardinalities of the T -orbits that allows us to topologize ( X , T ) as a topological dynamical system on a compact Hausdorff space. This extends an early result of H. de Vries concerning compact metric dynamical systems. An analogous result is obtained for 𝐙 2 -actions without periodic points.