borel automorphisms of a Cantor set;
homeomorphism of a Cantor set;
Rokhlin lemma;
full group of a homeomorphism;
BOREL;
AUTOMORPHISMS;
TOPOLOGIES;
DYNAMICS;
SYSTEMS;
D O I:
10.4064/fm194-1-1
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
We continue the study of topological properties of the group Homeo(X) of all homeomorphisms of a Cantor set X with respect to the uniform topology tau, which was started by Bezuglyi, Dooley, Kwiatkowski and Medynets. We prove that the set of periodic homeomorphisms is tau-dense in Homeo(X) and deduce from this result that the topological group (Homeo(X), tau) has the Rokhlin property, i.e., there exists a homeomorphism whose conjugacy class is tau-dense in Homeo(X). We also show that for any homeomorphism T the topological full group [[T]] is tau-dense in the full group [T].