The Ext algebra of a Brauer graph algebra

Edward Green, Sibylle Schroll, Nicole Snashall, Rachel Taillefer
2017 Journal of Noncommutative Geometry  
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 K2.
doi:10.4171/jncg/11-2-4 fatcat:rpqpoxi5xzfdnnpjtbuh23j6zy