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arXiv 1107.3102math.AC
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局部环上Tate同调和深度公式的消失

Vanishing of Tate homology and depth formulas over local rings

Lars Winther Christensen, David A. Jorgensen

摘要:

Auslander关于正则局部环上的Tor-无关模对的深度公式,深度(M \otimes N)=深度(M)+深度(N)-深度(R),在过去的四十年中得到了几个方向的推广.本文建立了Gorenstein局部环上Tate Tor-独立模对的深度公式。它包含以前的推广Auslander的公式,并产生确切的界限消失的上同调在某些Gorenstein环。

英文摘要:

Auslander's depth formula for pairs of Tor-independent modules over a regular local ring, depth(M \otimes N) = depth(M) + depth(N) - depth(R), has been generalized in several directions over a span of four decades. In this paper we establish a depth formula that holds for every pair of Tate Tor-independent modules over a Gorenstein local ring. It subsumes previous eneralizations of Auslander's formula and yields exact bounds for vanishing of cohomology over certain Gorenstein rings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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