Students Set Theory Seminar (HUJI)
We shall meet Wednesday (December 10) in the Hebrew University (in Ross 70), 14:45-16:00.
Speaker: Chris Lambie-Hanson
Title: Bounded Stationary Reflection
Abstract: Eisworth, motivated in part by his work on square-bracket partition relations, asked whether it must be the case that if mu is a singular cardinal and every stationary subset of mu^+ reflects, then every stationary subset of mu^+ reflects at an ordinal of arbitrarily high cofinality below mu. We will give some background motivation, sketch a proof answering this question in the negative, and discuss various variations on Eisworth’s question.