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math.LO2004★ 2 cited
Turbulence, amalgamation and generic automorphisms of homogeneous structures
Alexander S. Kechris, Christian Rosendal
We study topological properties of conjugacy classes in Polish groups, with emphasis on automorphism groups of homogeneous countable structures. We first consider the existence of…
math.LO2000
How many Turing degrees are there?
Randall Dougherty, Alexander S. Kechris
A Borel equivalence relation on a Polish space is said to be countable if all of its equivalence classes are countable. Standard examples of countable Borel equivalence relations (…