Time:  12:00  13:20 
Room: 
Wean Hall 7201

Speaker: 
Chris LambieHanson Department of Mathematical Sciences Carnegie Mellon University 
Title: 
Jonsson cardinals, partition relations and stationary reflection

Abstract: 
I will give an introduction to Jonsson cardinals and related square bracket partition relations. We will prove some of the basic facts about Jonsson cardinals, focusing in particular on the important open question of whether the successor of a singular cardinal can be Jonsson. This will involve a discussion of the connections between Jonsson cardinals and stationary reflection, which will lead into a recent result of Cummings and myself. 