Simon Thomas
Abstract
Open-access reader
If the countable group G has a nonabelian free subgroup, then there exists a standard Borel G -space such that the corresponding orbit equivalence relation is countable universal. In this paper, we will consider the question of whether the converse also holds.
OpenAlex reports 8 citations for this work. Citation counts describe recorded attention and do not establish research quality.
A contribution statement is not available in the OpenAlex record.
Method details are not available in the OpenAlex metadata.
Findings are not separately available in the OpenAlex metadata.
Limitations are not available in the OpenAlex metadata.
Application details are not available in the OpenAlex metadata.
If the countable group G has a nonabelian free subgroup, then there exists a standard Borel G -space such that the corresponding orbit equivalence relation is countable universal. In this paper, we will consider the question of whether the converse also holds.
Key concepts: Mathematics, Countable set, Pure mathematics, Borel set, Second-countable space, Discrete mathematics