Combinatorial examples and applications of 2-Segal sets
arXiv:2411.18544
Abstract
We give an introduction to the theory of 2-Segal sets, and two of the main applications of them: Hall algebras and a discrete version of Waldhausen's -construction. We present several combinatorial examples and how these constructions can be applied to them.
18 pages. Expanded version of my talk at the ECOGyT conference in August 2024. Comments welcome