# Bill Chen: Variations of the stick principle

BGU seminar in Logic, Set Theory and Topology

Time: Tuesday, June 27th, 12:15-13:30.
Place: Seminar room -101, Math building 58.
Speaker: Bill Chen (BGU)

Title: Variations of the stick principle

Abstract:
The stick principle asserts that there is a family of infinite subsets of $\omega_1$ of size $\aleph_1$ so that any uncountable subset of $\omega_1$ has some member of the family as a subset. We will give a forcing construction to separate versions of the stick principle which put a bound on the order-type of the subsets in the family. Time permitting, we will say a little about the relation of the stick principle with the existence of Suslin trees.