Games, Sets, Math!

Let $\kappa$ be a cardinal. The Milner-Rado paradox states: Every ordinal $\beta<\kappa^+$ can be written as $\bigcup_{n<\omega} X_...

At the BGU department awards ceremony, a certain name appeared with spooky regularity, like subtle clues in a novel. Profs. Miriam Cohe...

We are continuing  the construction of Balogh's Dowker space of size continuum. From the paper, he says: "The heart of the proo...

A Dowker space is a normal space which is not countably paracompact. Here, a (Hausdorff) space $X$ is normal if for every pair of disjoint ...

I have been in Israel at Ben-Gurion University for the past year (and plan to stay here for one more year), and I'm working on some new ...

This lecture will introduce some basic properties of Sacks forcing for uncountable inaccessible cardinals, and examine an Easton support ite...

Recently, I've been talking with John Susice about some elementary Olympiad-style problems. I told him that in high school I was taught ...