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Talk:F-sigma

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Revision as of 09:09, 16 August 2012 by Boris Tsirelson (talk | contribs) (not itself closed?)
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"and which is not itself closed"?? In the books I read F is included into Fsigma (and generally, each class is wider than previous classes). --Boris Tsirelson 11:09, 16 August 2012 (CEST)

How to Cite This Entry:
F-sigma. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=F-sigma&oldid=27597
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