Asymptotic linearity of multigraded Betti numbers

Details Asymptotic linearity of multigraded Betti numbers Asymptotic linearity of multigraded Betti numbers

2011-10-03

arxiv.org/abs/1110.0383v2

Mathematics

Commutative Algebra

14 pages

Scientific paper

Let $G$ be a finitely generated abelian group, and let $S = A[x_1, ..., x_n]$ be a $G$-graded polynomial ring over a commutative ring $A$. Let $I_1, ..., I_s$ be $G$-homogeneous ideals in $S$, and let $M$ be a finitely generated $G$-graded $S$-module. We show that, when $A$ is Noetherian, the nonzero $G$-graded Betti numbers of $MI_1^{t_1} ... I_s^{t_s}$ exhibit an asymptotic linear behavior as the $t_i$s get large.

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