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arxiv: 1412.7125 · v3 · pith:K2MP6QOAnew · submitted 2014-12-22 · 🧮 math.AC

Using semidualizing complexes to detect Gorenstein rings

classification 🧮 math.AC
keywords finitecomplexdimensiongorensteinsemidualizingdepthexistsfoxby
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A result of Foxby states that if there exists a complex with finite depth, finite flat dimension, and finite injective dimension over a local ring $R$, then $R$ is Gorenstein. In this paper we investigate some homological dimensions involving a semidualizing complex and improve on Foxby's result by answering a question of Takahashi and White. In particular, we prove for a semidualizing complex $C$, if there exists a complex with finite depth, finite $\mathcal{F}_C$-projective dimension, and finite $\mathcal{I}_C$-injective dimension over a local ring $R$, then $R$ is Gorenstein.

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