Dominique Lecomte: Baire class xi colorings

Tuesday October 18, 16.30
Mathematical Institute, University of Bonn, room 0.003

Dominique Lecomte (University of Paris 6): Baire class xi colorings

The G_0-dichotomy due to Kechris, Solecki and Todorcevic characterizes the analytic relations having a Borel measurable countable coloring. Our goal is to find a version of the G_0-dichotomy for xi-measurable countable colorings. We give a positive solution for the first three levels, as well as some recent progress for the general case.

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