Extriangulated structures from stability conditions and application to braid representations

Abstract

We use the notion of Bridgeland stability condition and an associated rank function to endow triangulated categories with extriangulated structures and study their extriangulated Grothendieck groups. This study is motivated by Khovanov–Seidel’s categorification of the Burau representation, from which can be extracted the Lawrence–Krammer–Bigelow representation, providing a relation between these two faithful representations of the braid groups.