Speaker: 

Jouko Vaananen

Institution: 

University of Helsinki

Time: 

Monday, November 28, 2022 - 4:00pm to 5:30pm

Host: 

Location: 

RH 440 R

Godel's constructible universe uses first order logic to build a model of ZFC containing all of the ordinals and where the GCH holds.  This talk describes a method of building analogous models using Stationary Logic. These are well-founded inner models of stronger axioms than ZFC that retain elements of fine structure. 

Stationary Logic is a stronger logic than first order logic, but retains desirable model theoretic aspects.