Time:  12:00  13:20 
Room: 
Wean Hall 7201 (tentative)

Speaker: 
Ernest Schimmerling Department of Mathematical Sciences CMU 
Title: 
How much square is true ?

Abstract: 
I'll discuss a recent equiconsistency proved by John Krueger and myself between the failure of a partial square principle introduced by Saharon Shelah and the existence of a greatly Mahlo cardinal. The terminology will be explained and the proofs will be outlined in some detail. 