# Franklin Tall: On the sigma-compactness of definable Menger spaces

Place: Fields Institute (Room 210)

Date: December 2, 2016 (13:30-15:00)

Speaker: Franklin Tall, University of Toronto

Title: On the sigma-compactness of definable Menger spaces

Abstract:  In a previous seminar, we saw that an inaccessible sufficed for the consistency of “every projective Menger set of reals is sigma-compact”. The inaccessible is in fact necessary.