On Rigid Minimal Spaces

TL;DR

This paper explores the properties of rigid minimal spaces, revealing new classes of spaces with minimal homeomorphisms but no minimal maps, and introduces methods to construct such spaces with specific symmetry groups.

Contribution

It demonstrates that classes of rigid minimal spaces do not coincide, introduces spaces with minimal homeomorphisms but no minimal maps, and provides a construction method for spaces with cyclic homeomorphism groups.

Findings

The classes of rigid minimal spaces are distinct.

Existence of minimal spaces with degenerate homeomorphism groups.

A new construction method for decomposable spaces with cyclic homeomorphism groups.

Abstract

A compact space $X$ is said to be minimal if there exists a map $f:X\to X$ such that the forward orbit of any point is dense in $X$. We consider rigid minimal spaces, motivated by recent results of Downarowicz, Snoha, and Tywoniuk [J. Dyn. Diff. Eq., 2016] on spaces with cyclic group of homeomorphisms generated by a minimal homeomorphism, and results of the first author, Clark and Oprocha [ Adv. Math., 2018] on spaces in which the square of every homeomorphism is a power of the same minimal homeomorphism. We show that the two classes do not coincide, which gives rise to a new class of spaces that admit minimal homeomorphisms, but no minimal maps. We modify the latter class of examples to show for the first time the existence of minimal spaces with degenerate homeomorphism groups. Finally, we give a method of constructing decomposable compact and connected spaces with cyclic group of homeomorphisms, generated by a minimal homeomorphism, answering a question in Downarowicz et al.