Zigzags, adjoints, and bordisms
April 20, 2026 @ 3:00 pm - 4:00 pm

Speaker: Lorenzo Riva (Harvard CMSA)
Title: Zigzags, adjoints, and bordisms
Abstract: We will learn how to freely add adjoints to a category using a combinatorial procedure which involves drawing zigzags of squares. Peculiarly, we can use these to draw some bordisms. This is joint work with Martina Rovelli.