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arxiv: 0801.0401 · v2 · submitted 2008-01-02 · 🧮 math.RA · math.AC

Algebras that satisfy Auslander's condition on vanishing of cohomology

classification 🧮 math.RA math.AC
keywords auslanderringsconditionalgebraartincohomologyconjecturesatisfy
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Auslander conjectured that every Artin algebra satisfies a certain condition on vanishing of cohomology of finitely generated modules. The failure of this conjecture - by a 2003 counterexample due to Jorgensen and Sega - motivates the consideration of the class of rings that do satisfy Auslander's condition. We call them AC rings and show that an AC Artin algebra that is left-Gorenstein is also right-Gorenstein. Furthermore, the Auslander-Reiten Conjecture is proved for AC rings, and Auslander's G-dimension is shown to be functorial for AC rings that are commutative or have a dualizing complex.

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