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Tuesday, January 12, 2016
3:00 PM - 4:30 PM

Logic Seminar

The countable admissible ordinal equivalence relation, III
William Chan, Graduate Student, Mathematics, Caltech,

In this talk I will show that there is no Borel reduction of an isomorphism relation of a counterexample to Vaught's conjecture to the countable admissible ordinal equivalence relation in set generic extensions of the constructible universe.

For more information, please contact Alexander Kechris by email at or visit