Arturo Martinez-Celis: Michael Spaces and Selective Ultrafilters

Tuesday, November 30, 2021 17:00

Location: room 605, Mathematical Institute, University of Wroclaw

Speaker:
Arturo Martinez-Celis

Title: Michael Spaces and Selective Ultrafilters

Abstract: Lindelöf space X is Michael if it has a non-Lindelöf product with the space of irrational numbers. The existence of these kinds of spaces using only the standard axioms of ZFC is still unknown. We will look into some of the combinatorics related to this problem and discuss its relationships with Selective Ultrafilters.