Auslander–Reiten map characterisation of Auslander-Gorenstein algebras

Let AA be a finite-dimensional KK-algebra over an algebraically closed field KK. Say that AA has a well-defined Auslander–Reiten map if every indecomposable injective AA-module has a finite minimal projective resolution whose last term is an indecomposable projective module. Auslander–Reiten map conjecture. The algebra AA is Auslander-Gorenstein if and only if it has a well-defined Auslander–Reiten map that is a bijection. This conjecture proposes a converse to the Auslander–Reiten bijection for Auslander-Gorenstein algebras and would characterise such algebras through their injective resolutions.

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Primary source

Viktória Klász and Rene Marczinzik, “A survey on Auslander-Gorenstein algebras”, arXiv:2508.19079 (2025).

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