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arXiv 2102.00308math.ACcs.ITmath.IT
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与Reed-Muller码相关的Stanley-Reisner环分解的纯性

On the Purity of Resolutions of Stanley-Reisner Rings Associated to Reed-Muller Codes

Sudhir R. Ghorpade, Rati Ludhani

摘要:

根据Johnsen和Verdure(2013),我们可以将任何线性码$C$与抽象单纯复形相关联,进而与斯坦利-赖斯纳环$R_C$相关联。环$R_C$是域上的标准分次代数,它的投射维数正好是$C$的维数.因此,$R_C$允许一个分次极小自由分解,由此得到的分次贝蒂数可以确定$C$的广义Hamming权.当$C$是广义Reed-Muller码时,Ghorpade和Singh(2020)考虑了$R_C$的最小自由分解的纯度问题。他们表明,决议是纯的,在某些情况下,它是不纯的,在许多其他情况下。本文给出了任意阶广义Reed-Muller码的Stanley-Reisner环的分次极小自由分解的纯性的一个完整刻画.

英文摘要:

Following Johnsen and Verdure (2013), we can associate to any linear code $C$ an abstract simplicial complex and in turn, a Stanley-Reisner ring $R_C$. The ring $R_C$ is a standard graded algebra over a field and its projective dimension is precisely the dimension of $C$. Thus $R_C$ admits a graded minimal free resolution and the resulting graded Betti numbers are known to determine the generalized Hamming weights of $C$. The question of purity of the minimal free resolution of $R_C$ was considered by Ghorpade and Singh (2020) when $C$ is the generalized Reed-Muller code. They showed that the resolution is pure in some cases and it is not pure in many other cases. Here we give a complete characterization of the purity of graded minimal free resolutions of Stanley-Reisner rings associated to generalized Reed-Muller codes of an arbitrary order.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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