摘要翻译:
设G是一个光滑代数群,作用于一个簇X上。设F和E是X上的相干束。我们证明了如果F对G-轨道的所有高Tor束都消失,那么对于G中的泛型G,对于所有j>0,束Tor^X_J(gF,E)消失。这推广了Miller和Speyer关于传递群作用的一个结果,以及Speiser关于一般群作用下光滑子群在特征为0的代数闭域上的一般横截性的一个结果,它本身推广了经典的Kleiman-Bertini定理。
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英文标题:
《A general homological Kleiman-Bertini theorem》
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作者:
Susan J. Sierra
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最新提交年份:
2009
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分类信息:
一级分类:Mathematics 数学
二级分类:Algebraic Geometry 代数几何
分类描述:Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇,叠,束,格式,模空间,复几何,量子上同调
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一级分类:Mathematics 数学
二级分类:Rings and Algebras 环与代数
分类描述:Non-commutative rings and algebras, non-associative algebras, universal algebra and lattice theory, linear algebra, semigroups
非交换环与代数,非结合代数,泛代数与格论,线性代数,半群
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英文摘要:
Let G be a smooth algebraic group acting on a variety X. Let F and E be coherent sheaves on X. We show that if all the higher Tor sheaves of F against G-orbits vanish, then for generic g in G, the sheaf Tor^X_j(gF, E) vanishes for all j >0. This generalizes a result of Miller and Speyer for transitive group actions and a result of Speiser, itself generalizing the classical Kleiman-Bertini theorem, on generic transversality, under a general group action, of smooth subvarieties over an algebraically closed field of characteristic 0.
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PDF链接:
https://arxiv.org/pdf/0705.0055