A guide to the literature on topological K-theory (in progress, last edit: November 2025)
An ongoing project to assemble a concise yet thorough categorized map of the literature on topological K-theory. The goal is to make it easy to learn what is known and where various things are discussed.
Strong monoidal functors and modules (2023)
While trying to sort out varying Clifford algebra sign conventions in the literature, I wanted to know that a strong monoidal functor which is an isomorphism of categories preserves categories of modules. I couldn't find this fact anywhere, so I wrote up a proof. A similar fact holds for equivalences of categories.
Stories about Friedhelm Waldhausen (by members of the algebraic topology community)
A collection of thoughts and stories about Waldhausen that were shared by members of the alg-top email list.