HUJI Logic Seminar
Tuesday 1/5 at Math 209 13:30-15:30
Speaker: Asaf Karagila
Title: What can you say about critical cardinals?
Abstract. We isolate the property of being a critical point, and prove some basic positive properties of them. We will also prove a lifting property that allows lifting elementary embedding to symmetric extensions, and outline a construction that shows that it is consistent that a successor of a critical cardinal is singular. This is a recent work with Yair Hayut.