Irreducible morphisms and Auslander-Reiten triangles in the stable category of modules over a repetitive algebra take three canonical shapes, and every such triangle is induced by an Auslander-Reiten sequence.
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On irreducible morphisms and Auslander-Reiten triangles in the stable category of modules over repetitive algebras
Irreducible morphisms and Auslander-Reiten triangles in the stable category of modules over a repetitive algebra take three canonical shapes, and every such triangle is induced by an Auslander-Reiten sequence.