Chapter 42: Descriptive set theory
Souslin's operation; is idempotent; as a projection operator; Souslin-F sets; *constituents.
Usco-compact relations; K-analytic sets; and Souslin-F sets; *First Separation Theorem.
Analytic spaces; are K-analytic spaces with countable networks; Souslin-F sets; Borel measurable functions; injective images of Polish spaces; non-Borel analytic sets; a von Neumann-Jankow selection theorem; *constituents of coanalytic sets.
Standard Borel spaces
Basic properties; isomorphism types; subspaces; Borel measurable actions of Polish groups.
Realization of automorphisms
Extending group actions; Törnquist's theorem.
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