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On the complexity of topological conjugacy of compact metrizable $G$-ambits. (arXiv:1706.09821v1 [math.LO])

来源于:arXiv
In this note, we analyze the classification problem for compact metrizable $G$-ambits for a countable discrete group $G$ from the point of view of descriptive set theory. More precisely, we prove that the topological conjugacy relation on the standard Borel space of compact metrizable $G$-ambits is Borel for every countable discrete group $G$. 查看全文>>