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Results tagged with projective-resolution
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user 492131
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Sum of Betti numbers and certain short exact sequence of modules of finite length over regul...
Let $N$ be a module of finite length over a regular local ring $R$ of characteristic $0$. Let $M$ be an $R$-module which fits into a short exact sequence $0\to N^{\oplus a}\to M \to N^{\oplus b}\to 0$ …
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