Modules of G-dimension zero over local rings with the cube of maximal ideal being zero

Details Modules of G-dimension zero over local rings with the cube of maximal ideal being zero Modules of G-dimension zero over local rings with the cube of maximal ideal being zero

2003-03-07

arxiv.org/abs/math/0303086v1

Mathematics

Commutative Algebra

20 pages

Scientific paper

Let $(R, \m)$ be a commutative Noetherian local ring with $\m^3 =(0)$. We give a condition for $R$ to have a non-free module of G-dimension zero. We shall also construct a family of non-isomorphic indecomposable modules of G-dimension zero with parameters in an open subset of projective space. We shall finally show that the subcategory consisting of modules of G-dimension zero over $R$ is not necessarily a contravariantly finite subcategory in the category of finitely generated $R$-modules.

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