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Selforthogonal modules over Artinian Gorenstein Rings.rings
Let $R$ be a local artinian Gorenstein ring and $M$ a finitely generated $R$-module, then
$Ext_R^1(M,M) = 0$$\mathrm{Ext}_R^1(M,M) = 0$ if only if $M$ is projective?
Selforthogonal modules over Artinian Gorenstein Rings.
Let $R$ be a local artinian Gorenstein ring and $M$ a finitely generated $R$-module, then
$Ext_R^1(M,M) = 0$ if only if $M$ is projective?
Selforthogonal modules over Artinian Gorenstein rings
Let $R$ be a local artinian Gorenstein ring and $M$ a finitely generated $R$-module, then
$\mathrm{Ext}_R^1(M,M) = 0$ if only if $M$ is projective?
