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arXiv math/0011211math.AC
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双阶化代数的同调性质

Homological properties of bigraded algebras

Tim Roemer

摘要:

研究了双阶化K-代数R的x-正则性和y-正则性。这些概念被用来研究某些双阶生成双阶化模的渐近性质。作为应用,我们得到了对于任意等生分次理想I,reg(I^j)是线性函数且j >= j_0的数j_0的上界.最后给出了广义Veronese代数的x-正则性和y-正则性的上界。

英文摘要:

We study the x- and y-regularity of a bigraded K-algebra R. These notions are used to study asymptotic properties of certain finitely generated bigraded modules. As an application we get for any equigenerated graded ideal I upper bounds for the number j_0 for which reg(I^j) is a linear function for j >= j_0. Finally we give upper bounds for the x- and y-regularity of generalized Veronese algebras.

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