The Ext algebra of a Brauer graph algebra
Edward L. Green
Virginia Tech, Blacksburg, USASibylle Schroll
University of Leicester, UKNicole Snashall
University of Leicester, UKRachel Taillefer
Université Clermont Auvergne, Université Blaise Pascal, Clermont-Ferrand, France
Abstract
In this paper we study finite generation of the Ext algebra of a Brauer graph algebra by determining the degrees of the generators. As a consequence we characterize the Brauer graph algebras that are Koszul and those that are .
Cite this article
Edward L. Green, Sibylle Schroll, Nicole Snashall, Rachel Taillefer, The Ext algebra of a Brauer graph algebra. J. Noncommut. Geom. 11 (2017), no. 2, pp. 537–579
DOI 10.4171/JNCG/11-2-4