The last problem sessions (for additive combinatorics and branching processes—two shorter ones because the student seminars canceled some) were today. Alas.

The person who used to teach the BSM Putnam problem-solving seminar is gone, so Dezső Miklos, the Hungarian administrator of BSM, who’d heard of my IMC results, asked me to teach it. Not the contest I’d most want to teach a class for, by quite a bit, but it should still be fun.