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Regularity of Cohen-Macaulay Specht ideals
Journal of Algebra ( IF 0.8 ) Pub Date : 2021-05-07 , DOI: 10.1016/j.jalgebra.2021.04.022 Kosuke Shibata , Kohji Yanagawa
中文翻译:
Cohen-Macaulay Specht理想的规律性
更新日期:2021-05-11
Journal of Algebra ( IF 0.8 ) Pub Date : 2021-05-07 , DOI: 10.1016/j.jalgebra.2021.04.022 Kosuke Shibata , Kohji Yanagawa
For a partition λ of , let be the ideal of generated by all Specht polynomials of shape λ. In the previous paper, the second author showed that if is Cohen-Macaulay, then λ is either , or , and the converse is true if . In this paper, we compute the Hilbert series of for or . Hence, we get the Castelnuovo-Mumford regularity of , when it is Cohen-Macaulay. In particular, has a -linear resolution in the Cohen–Macaulay case.
中文翻译:
Cohen-Macaulay Specht理想的规律性
对于λ的分区, 让 成为理想 由形状为λ的所有Specht多项式生成。在上一篇论文中,第二作者表明,如果是Cohen-Macaulay,则λ是, 或者 ,并且反之亦然,如果 。在本文中,我们计算了希尔伯特级数 为了 或者 。因此,我们得到了Castelnuovo-Mumford的正则性,当它是科恩-马考雷时。特别是, 有一个 Cohen–Macaulay情况下的线性分辨率。