Regularity of Cohen-Macaulay Specht ideals

Regularity of Cohen-Macaulay Specht ideals
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科恩-麦考利·斯佩希特理想的正则性

DOI:
10.1016/j.jalgebra.2021.04.022
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发表时间:
2021
期刊:
影响因子:
0.9
通讯作者:
Yanagawa Kohji
Yanagawa Kohji
中科院分区:
数学3区
文献类型:
--
作者:
Shibata Kosuke;Yanagawa Kohji

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对于n∈ N的一个划分λ,设I λ Sp是R= K [x1,...,xn]的理想,由所有形状为λ的Specht多项式生成.在前一篇论文中,第二作者证明了如果R/I λ Sp是Cohen-Macaulay,则λ是(n-d,1,...,1),(n-d,d)或(d,d,1),如果char(K)= 0,则匡威亦然。本文计算了R/I λ Sp(λ=(n-d,d)或(d,d,1))的Hilbert级数.因此,当R/I λ Sp为Cohen-Macaulay时,我们得到了R/I λ Sp的Castelnuovo-Mumford正则性.特别地,I(d,d,1)Sp在Cohen-Macaulay情形下具有(d+ 2)-线性分辨率。
For a partition λ of n∈ N, let I λ Sp be the ideal of R= K [x 1,…, x n] generated by all Specht polynomials of shape λ. In the previous paper, the second author showed that if R/I λ Sp is Cohen-Macaulay, then λ is either (n− d, 1,…, 1),(n− d, d), or (d, d, 1), and the converse is true if char (K)= 0. In this paper, we compute the Hilbert series of R/I λ Sp for λ=(n− d, d) or (d, d, 1). Hence, we get the Castelnuovo-Mumford regularity of R/I λ Sp, when it is Cohen-Macaulay. In particular, I (d, d, 1) Sp has a (d+ 2)-linear resolution in the Cohen–Macaulay case.
具有线性分辨率的 Cohen-Macaulay 环的 Koszul 同调
DOI: 10.1090/s0002-9939-1992-1089412-9
发表时间: 1992
期刊: --
影响因子: --
作者:
C. Rentería;R. Villarreal
通讯作者: R. Villarreal
DOI: --
发表时间: 2006
期刊: Integrable systems, geometry, and topology, AMS/IP Studies of Advanced Mathematics, American Mathematical Society 36
影响因子: --
作者:
FURUYA;Jun;Martin Guest
通讯作者: Martin Guest