What is... set-theoretic topology?

William Weiss will explain what Set-theoretic Topology is.

Abstract: Here's a conversation with a Geometric Topologist friend:
"When you work in Set-theoretic Topology, what is the dimension of your spaces?"
"Zero. Zero-dimensional spaces.
"But... but... that's dust!"
"Yeah—gold dust"

"What is...?" is an accessible and non-technical seminar where speakers explain in one (short) lecture some object or theorem that they think is interesting. There will be drinks and snacks during the talk. See the seminar website for more information.