Andrzej Rosłanowski: Borel sets without perfectly many overlapping translations

Tuesday, December 1, 2020 17:00

Location: Zoom.us: if you want to participate please contact organizers

Speaker:
Andrzej Rosłanowski (University of Nebraska Omaha)

Title: Borel sets without perfectly many overlapping translations

Abstract: For a perfect Abelian Polish group H we force a Borel set B which has many translations with pairwise intersections of size at least k, but does not have a perfect set of such translations. This is joint work with Saharon Shelah.