Date: Thursday, November 04, 2021
Location: 2866 East Hall (4:00 PM to 5:30 PM)
Title: Tukey ordering and forcing preservation of ultrafilters
Abstract: Abstract: This will be a continuation of last week's talk in which I discussed the Tukey ordering of ultrafilters. This week, I'll talk about a species of ultrafilters defined in terms of preservation by forcing. This species, like last week's, also admits a combinatorial definition. The two combinatorial definitions have a very similar "flavor". I'll speculate about prospects for combining the two sorts of combinatorial definitions.
Files:
Speaker: Andreas Blass
Institution: UM
Event Organizer: Andreas R Blass ablass@umich.edu
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