Speaker: Julie Bergner (Virgina) Title: Combinatorial examples of 2-Segal sets and their Hall algebras Abstract: The notion of a 2-Segal set encodes an algebraic structure that is similar to that of a category, but for which composition need not exist or be unique, yet is still associative. The fact that such structures give rise to…Continue Reading 9-18-2025: Julie Bergner, “Combinatorial examples of 2-Segal sets and their Hall algebras”
