On the degree of Hilbert polynomials associated to the torsion functor

被引:7
作者
Katz, Daniel [1 ]
Theodorescu, Emanoil
机构
[1] Univ Kansas, Dept Math, Lawrence, KS 66045 USA
[2] Univ Missouri, Dept Math, Columbia, MO 65211 USA
关键词
Hilbert-Samuel polynomial; torsion functor; quasi-unmixed local ring;
D O I
10.1090/S0002-9939-07-08879-X
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Let R be a local, Noetherian ring and I. R an ideal. A question of Kodiyalam asks whether for fixed i > 0, the polynomial giving the ith Betti number of In has degree equal to the analytic spread of I minus one. Under mild conditions on R, we show that the answer is positive in a number of cases, including when I is divisible by m or I is an integrally closed m-primary ideal.
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页码:3073 / 3082
页数:10
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