pith. sign in

arxiv: 1104.3340 · v2 · pith:FB7N333Fnew · submitted 2011-04-17 · 🧮 math.DS · math.GR· math.LO

The group of homeomorphisms of the Cantor set has ample generics

classification 🧮 math.DS math.GRmath.LO
keywords cantoramplefraissegenericgenericsgrouphomeomorphismsprojective
0
0 comments X
read the original abstract

We show that the group of homeomorphisms of the Cantor set $H(K)$ has ample generics, that is, for every $m$ the diagonal conjugacy action $g\cdot(h_1,h_2,..., h_m)=(gh_1g^{-1},gh_2g^{-1},..., gh_mg^{-1})$ of $H(K)$ on $H(K)^m$ has a comeager orbit. This answers a question of Kechris and Rosendal. We show that the generic tuple in $H(K)^m$ can be taken to be the limit of a certain projective Fraisse family. We also present a proof of the existence of the generic homeomorphism of the Cantor set in the context of the projective Fraisse theory.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.