Hilbert-Kunz density function for graded domains
Hilbert-Kunz density function for graded domains
复制标题
分级域的 Hilbert-Kunz 密度函数
DOI:
10.1016/j.jpaa.2021.106835
复制
发表时间:
2022
影响因子:
0.8
通讯作者:
Watanabe Kei-Ichi
中科院分区:
文献类型:
--
作者:
Trivedi Vijaylaxmi;Watanabe Kei-Ichi
We prove the existence of HK density function for a graded pair (R, I), where R is an N-graded domain of finite type over a perfect field and I⊂ R is a graded ideal of finite colength. This generalizes our earlier result where one proves the existence of such a function for a pair (R, I), where, in addition R is standard graded. Other properties of the HK density functions also hold for the graded pairs: for example, it is a multiplicative function for Segre products, its maximum support is the F-threshold of an m-primary ideal provided Proj R is smooth, it has a closed formula when either I is generated by a system of parameters or R is of dimension two. As one of the consequences we show that if G is a finite group scheme acting linearly on a polynomial ring R of dimension d then the HK density function f R G, m G, of the pair (R G, m G), is a piecewise polynomial function of degree d− 1. We also compute the HK density functions for (R G, m G), where G⊂ S L 2 (k) is a finite group acting linearly on the ring k [X, Y].
登录
查看更多内容
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
P. Monsky
通讯作者:
P. Monsky
DOI:
--
发表时间:
1973
期刊:
影响因子:
--
作者:
Christian Peskine;L. Szpiro
通讯作者:
L. Szpiro
影响因子:
0.8
作者:
Kei
通讯作者:
Kei
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
Kei;KEN
通讯作者:
KEN
影响因子:
1.3
作者:
V. Trivedi
通讯作者:
V. Trivedi