Non-Borel set/Advanced: Difference between revisions

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imported>Boris Tsirelson
(complete in the class of analytic sets)
(No difference)

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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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