NDLI: Representing Projective Sets as Unions of Borel Sets

Content Provider	Scilit
Author	Becker, Howard
Copyright Year	1995
Description	We consider a method of representing projective sets by a particular type of union of Borel sets, assuming AD. We prove a generalization of the theorem that a set is $\sum _2^1$ iff it is the union of ${\omega _1}$ Borel sets.
Related Links	https://www.ams.org/proc/1995-123-03/S0002-9939-1995-1224612-9/S0002-9939-1995-1224612-9.pdf
Ending Page	886
Page Count	4
Starting Page	883
ISSN	00029939
e-ISSN	10886826
DOI	10.2307/2160814
Journal	Proceedings of the American Mathematical Society
Issue Number	3
Volume Number	123
Language	English
Publisher	Duke University Press
Publisher Date	1995-03-01
Access Restriction	Open
Subject Keyword	Logic Projective Sets Sum Iff Omega Theorem Sets As Unions Unions of Borel Borel Sets Representing Projective
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics

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Representing Projective Sets as Unions of Borel Sets