Abstract
Part of the theory of the first level of the does so projective hierarchy (Π 11 and Σ 11 sets) extends to the second level but does so with an interesting twist. This is based on the fact that the rank or scale properties are preserved under projections.
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© 1995 Springer-Verlag New York, Inc.
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Kechris, A.S. (1995). Projective Determinacy. In: Classical Descriptive Set Theory. Graduate Texts in Mathematics, vol 156. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-4190-4_38
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DOI: https://doi.org/10.1007/978-1-4612-4190-4_38
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-8692-9
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