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  • Alexander S. Kechris
Part of the Graduate Texts in Mathematics book series (GTM, volume 156)

Abstract

The following is perhaps the archetypical Σ 1 1 -complete set. Recall from 4.32 that Tr is the space of trees on ℕ (viewed as a closed subspace of \({2^{{\mathbb{N}^{ < \mathbb{N}}}}}\)).

Keywords

Hull 

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Copyright information

© Springer-Verlag New York, Inc. 1995

Authors and Affiliations

  • Alexander S. Kechris
    • 1
  1. 1.Alfred P. Sloan Laboratory of Mathematics and Physics Mathematics 253-37California Institute of TechnologyPasadenaUSA

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