Illinois Journal of Mathematics

G-dimension over local homomorphisms. Applications to the Frobenius endomorphism

Srikanth Iyengar and Sean Sather-Wagstaff

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We develop a theory of G-dimension over local homomorphisms which encompasses the classical theory of G-dimension for finitely generated modules over local rings. As an application, we prove that a local ring $R$ of characteristic $p$ is Gorenstein if and only if it possesses a nonzero finitely generated module of finite projective dimension that has finite G-dimension when considered as an $R$-module via some power of the Frobenius endomorphism of $R$. We also prove results that track the behavior of Gorenstein properties of local homomorphisms under composition and decomposition.

Article information

Illinois J. Math., Volume 48, Number 1 (2004), 241-272.

First available in Project Euclid: 13 November 2009

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Digital Object Identifier

Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 13D05: Homological dimension
Secondary: 13D25 13H10: Special types (Cohen-Macaulay, Gorenstein, Buchsbaum, etc.) [See also 14M05]


Iyengar, Srikanth; Sather-Wagstaff, Sean. G-dimension over local homomorphisms. Applications to the Frobenius endomorphism. Illinois J. Math. 48 (2004), no. 1, 241--272. doi:10.1215/ijm/1258136183.

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