Logic Seminar - Asaf Karagila
| Dates: | 4 March 2026 |
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| Times: | 15:00 - 16:00 |
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| What is it: | Seminar |
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| Organiser: | Department of Mathematics |
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| Who is it for: | University staff, External researchers, Current University students |
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Speaker: Asaf Karagila (University of Leeds)
Title: Intermediate models of ZF and weak versions of the Axiom of Choice.
Abstract: It is a well-known fact that two models of ZFC with the same sets of ordinals are equal. This fact has a generalisation using the Kinna–Wagner Principles, which suggest that the iterated power set of the ordinals is the same in both models. We will see an overview of these results, as well as a few surprising and interesting results from the past few years on the preservation and failure of these Kinna–Wagner Principles. This is joint work with Jonathan Schilhan. (Proficiency in forcing not required.)
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Frank Adams 1
Alan Turing Building
Manchester
