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- W2002392928 abstract "We generalize the theory of local cohomology and local duality to a large class of non-commutative N‐graded noetherian algebras; specifically, to any algebra, B, that can be obtained as graded quotient of some noetherian AS‐Gorenstein algebra, A. As an application, we generalize three “classical” commutative results. For any graded module M over B we have the Bass-numbers ui (M) = dimk Exti b(k, M), and we can then prove that for M finitely generated, we have • id(M) =sup{i|ui(M)≠0}; • the Bass-theorem: if id(M) < ∞, then id(M) = depth(B); • the “No Holes”-theorem: if depth(M) ≤i≤(M), then μi (M) ≠ 0, where id(M) is M's injective dimension as an object in the category of graded modules, while depth(M) is the smallest i such that Exti B(k, M) ≠ 0. As a further application, we also generalize a non‐vanishing result for local cohomology. It states that if M is a finitely generated graded B‐ module, then Here is the i'th local cohomology‐module of M. To prove this result, we need the AS‐Gorenstein algebra, A, of which B is a quotient, to satisfy the so-called Similar Submodule Condition, SSC, defined in [11] (for instance, A could be PI)." @default.
- W2002392928 created "2016-06-24" @default.
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- W2002392928 date "1997-01-01" @default.
- W2002392928 modified "2023-10-07" @default.
- W2002392928 title "Local cohomology for non-commutative graded algebras" @default.
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- W2002392928 doi "https://doi.org/10.1080/00927879708825875" @default.
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