Automorphisms of P(ω1)/fin
Speaker:
Juris Steprans, York University
Date and Time:
Friday, November 25, 2016 - 1:30pm to 3:00pm
Location:
Fields Institute, Room 210
Abstract:
The question of whether all automorphisms of P(κ)/fin are trivial has been settled in the following cases:
- For κ=ω by Rudin and Shelah
- For κ between ω2 and the first inaccessible by work of Larson & McKenney and Shelah and me.
However the second result hinges on the question for automorphisms of P(ω1)/fin. I will discuss a resolution to this question stemming from recent work of Shelah and me.