Time:  12:30  13:30 
Room: 
Wean Hall 8201

Speaker: 
James Cummings Department of Mathematical Sciences CMU 
Title: 
Building structures of size ℵ_{1}

Abstract: 
I'll talk about some easy constructions (mostly due to Stevo Todorcevic) of complicated objects of size ℵ_{1}. If time allows I'll also talk about generalisations to higher cardinals 