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arXiv 2511.04571math.ACmath.CT
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伪双化复叠与 torsion 模的半无限 MGM 对偶性

Pseudo-dualizing complexes of torsion modules and semi-infinite MGM duality

Leonid Positselski

AI总结:

本文研究了交换环中 torsion 模的半无限 MGM 对偶性,构造了伪双化复叠并探讨了其在不同环结构下的等价关系。

摘要:

本文是 arXiv.org:1703.04266 和 arXiv:1907.03364 的 MGM 版本,也是 arXiv:1503.05523 第五节的后续工作。在交换环 $S$ 中,给定一个弱正则有限生成理想 $J\subset S$,我们考虑 $J$-torsion $S$-模和 $J$-contramodule $S$-模相对于给定的 $J$-torsion $S$-模的伪双化复叠 $L^\bullet$ 的最大、抽象和最小对应类,并构造相关的三角等价。作为特殊情况,我们得到对于一个 $I$-adic 可协调的交换环 $R$,其弱正则理想 $I\subset R$,一个 $I$-torsion $R$-模的双化复叠 $D^\bullet$,以及环同态 $f\colon R\rightarrow S$,使得 $f(I)\subset J$ 且 $S$ 是 $R$-模的平坦模时,半导出范畴的等价。(如果环 $S$ 不是诺特环,则需要进一步假设,即称作对偶平坦性假设。)在这种情况下,伪双化复叠 $L^\bullet$ 被构造为一个 $J$-torsion $S$-模的复叠,其准同构于 $D^\bullet$ 与某些理想 $J\subset S$ 的生成集的无限双 Koszul 复叠的张量积。

英文摘要:

This paper is an MGM version of arXiv.org:1703.04266 and arXiv:1907.03364, and a follow-up to Section 5 of arXiv:1503.05523. In the setting of a commutative ring $S$ with a weakly proregular finitely generated ideal $J\subset S$, we consider the maximal, abstract, and minimal corresponding classes of $J$-torsion $S$-modules and $J$-contramodule $S$-modules with respect to a given pseudo-dualizing complex of $J$-torsion $S$-modules $L^\bullet$, and construct the related triangulated equivalences. As a special case, we obtain an equivalence of the semiderived categories for an $I$-adically coherent commutative ring $R$ with a weakly proregular ideal $I\subset R$, a dualizing complex of $I$-torsion $R$-modules $D^\bullet$, and a ring homomorphism $f\colon R\rightarrow S$ such that $f(I)\subset J$ and $S$ is a flat $R$-module. (If the ring $S$ is not Noetherian, then a certain further assumption, which we call quotflatness of the morphism of pairs $f\colon (R,I)\rightarrow(S,J)$, needs to be imposed.) In that case, the pseudo-dualizing complex $L^\bullet$ is constructed as a complex of $J$-torsion $S$-modules quasi-isomorphic to the tensor product of $D^\bullet$ with the infinite dual Koszul complex for some set of generators of the ideal $J\subset S$.

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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