The equality of Elias-Valla and the associated graded ring of maximal ideals

The equality of Elias-Valla and the associated graded ring of maximal ideals
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Elias-Valla 等式及相关的最大理想分级环

DOI:
10.1016/j.jpaa.2012.01.004
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发表时间:
2012
影响因子:
0.8
通讯作者:
K. Ozeki
K. Ozeki
中科院分区:
数学2区
文献类型:
--
作者:
K. Ozeki

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设(A,m)是Noether局部环,d=dimA>0,Q是A中的参数理想,它是A的极大理想m的约化.本文证明了Buchsbaum局部环A中m的伴随分次环的Buchsbaum性,其中m的Hilbert系数e0(m),Q的Hilbert系数e1(m),Q的Hilbert系数e1(m),A的嵌入维数v(A)满足Elias和Valla的等式2e0(m)− e1(m)+e1(Q)= v(A)−d+2.因此,Corso [1]提出的一个猜想得到了肯定的解决。
Let (A,m) be a Noetherian local ring with d=dimA>0 and Q be a parameter ideal in A which forms a reduction of maximal ideal m of A. In this article, we prove the Buchsbaumness of the associated graded ring of m in a Buchsbaum local ring A satisfying the equality 2e0(m)−e1(m)+e1(Q)=v(A)−d+2 of Elias and Valla, where e0(m), e1(m), and e1(Q) denote the Hilbert coefficients of m and Q, v(A) the embedding dimension of A, respectively. Hence a conjecture raised by Corso [1] is settled affirmatively.