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math.LO1997★ 1 cited
Vaught's conjecture on analytic sets
Greg Hjorth
This paper obtains an algebraic characterization of the Polish groups that satisfy Vaught's conjecture on sets.
math.LO1997
A universal Polish G-space
Greg Hjorth
If G is a Polish group, then there is a Polish G-space X which is universal among Polish G-spaces with respect to continuous G-embeddings.