Auslander-Reiten theory in proper abelian subcategories

Abstract: We study Auslander-Reiten theory in proper abelian subcategories of triangulated categories with a Serre functor. To initiate this, we use approximations of a Serre functor to construct Nakayama functors, which in turn allow for the construction of Auslander-Reiten translates and the existence of Auslander-Reiten sequences in suitable proper abelian subcategories. As an application, we recover the existence of Auslander-Reiten sequences in the category of finite dimensional modules over a finite dimensional algebra.