On Irreducible Morphisms and Auslander-Reiten Triangles in the Stable Category of Modules over Repetitive Algebras

Let k be an algebraically closed field, let Λ be a finite dimensional k-algebra, and let Λ be the repetitive algebra of Λ. For the stable category of finitely generated left Λ-modules b Λ-mod b , we show that the irreducible morphisms fall into three canonical forms: (i) all the component morphisms...