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UID:2021042202023220210413T16000020210413T1650006080d938e852e@uic.edu
CATEGORIES:MEETING
STATUS:TENTATIVE
DTSTAMP:20210421T081814
DTSTART:20210413T160000
DTEND:20210413T165000
SUMMARY:Logic Seminar: The decomposability conjecture, by Andrew Marks
DESCRIPTION:Andrew Marks (UCLA): The decomposability conjecture We characterize which Borel functions are decomposable into a countable union of functions which are piecewise continuous on $\Pi^0_n$ domains, assuming projective determinacy. One ingredient of our proof is a new characterization of what Borel sets are $\Sigma^0_n$ complete. Another important ingredient is a theorem of Harrington that there is no projective sequence of length $\omega_1$ of distinct Borel sets of bounded rank, assuming projective determinacy. This is joint work with Adam Day. Please click here to make changes to, or delete, this seminar announcement.
LOCATION:Zoom Chicago IL
CLASS:PRIVATE
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