Non-Borel set/Advanced

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< Non-Borel set
Revision as of 00:29, 19 June 2009 by imported>Boris Tsirelson (complete in the class of analytic sets)
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https://en.citizendium.org/wiki/index.php?title=Non-Borel_set/Advanced&printable=yes
An advanced level version of Non-Borel set.

The set under consideration is analytic, and complete in the class of analytic sets; therefore it is not Borel.

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