We will watch a talk given by Kathryn Hess. We might pause to discuss or discuss afterwards.
Abstract: I will define operads and modules over operads, in the context of both chain complexes and topological spaces. I will then describe a number of important examples of these structures arising in algebraic topology and explain their significance and utility.
The video and some notes are available here: https://www.msri.org/workshops/684/schedules/17858