The first Euler characteristics versus the homological degrees
The first Euler characteristics versus the homological degrees
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第一欧拉特征与同调度
DOI:
10.1007/s00574-014-0069-3
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
S. Goto and K. Ozeki
中科院分区:
文献类型:
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作者:
L. Ghezzi;S. Goto;J. Hong;K. Ozeki;T. T. Phuong;and W. V. Vasconcelos;S. Goto and K. Ozeki
LetMbe afinitely generatedmodule over aNoetherian local ring.This paper reports, for a given parameter idealQforM, a criterion for the equality χ1(Q;M) = hdegQ(M) − eQ0(M), where χ1(Q;M), hdegQ(M), and eQ0(M) respectively denote the first Euler characteristic, the homological degree, and the multiplicityofMwith respect toQ.We also study homological torsions ofMand give a criterion for a certain equality of the first Hilbert coefficients of parameters and the homological torsions ofM.