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arXiv 1905.09697math.AC
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Vanishing of Tor over fiber products

Thiago H. Freitas, Victor Hugo Jorge Pérez, Roger Wiegand, Sylvia Wiegand

英文摘要:

Let $(S,\mathfrak{m},k)$ and $(T,\mathfrak{n},k)$ be local rings, and let $R$ denote their fiber product over their common residue field $k$. Inspired by work of Naseh and Sather-Wagstaff, we explore consequences of vanishing of ${\rm Tor}^R_m(M,N)$ for various values of $m$, where $M$ and $N$ are finitely generated $R$-modules.

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