A GENERALIZATION OF THE AUSLANDER-BUCHSBAUM FORMULA

A GENERALIZATION OF THE AUSLANDER-BUCHSBAUM FORMULA
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AUSLANDER-BUCHSBAUM 公式的推广

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发表时间:
2005
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通讯作者:
H. Schoutens
H. Schoutens
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作者:
H. Schoutens

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设R是Noether局部环,Ω是有限深度和有限投射维数的任意R-模。在下列情况下,Ω的平坦维度至少是Depth(R)−Depth(Ω)且相等:(I)Ω是在某些Noether局部R-代数上有限生成的;(Ii)DIM(R)=1;(Iii)DIM(R)=2且Ω是分离的;(Iv)R是CohenMacaulay,DIM(R)=3且Ω是完备的。
Let R be a Noetherian local ring and Ω an arbitraryR-module of finite depth and finite projective dimension. The flat dimension of Ω is at leastdepth(R)−depth(Ω) with equality in the following cases: (i) Ω is finitely generated over some Noetherian local R-algebraS; (ii) dim(R) = 1; (iii) dim(R) = 2 andΩ is separated; (iv) R is CohenMacaulay,dim(R) = 3 andΩ is complete.