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Showing 2015 · math.LOShow all
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math.LO2015
Non-Archimedean Abelian Polish Groups and Their Actions
Longyun Ding, Su Gao
In this paper we consider non-archimedean abelian Polish groups whose orbit equivalence relations are all Borel. Such groups are called tame. We show that a non-archimedean abelian…
math.LO2015
The complexity of the classification problem of continua
Cheng Chang, Su Gao
We prove that the homeomorphism problem for connected compact metric spaces is Borel bireducible with a universal orbit equivalence relation induced by a Borel action of a Polish g…