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arXiv 1702.07765math.ACmath.CO
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Stanley-Reisner环的极小自由分解中的线性映射

Linear maps in minimal free resolutions of Stanley-Reisner rings

Lukas Katthän

摘要:

本文给出了单纯复形$Δ$的Stanley-Reisner环的最小自由分解的线性部分的初等刻划。实际上,线性部分的微分只是$Δ$的诱导子复形的单纯上同调中限制映射的汇编。一路上,我们还表明,如果一个单项理想有至少一个生成元的程度$2$,那么它的最小自由分解的线性链可以只使用$\pm 1$系数。

英文摘要:

In this short note we give an elementary description of the linear part of the minimal free resolution of a Stanley-Reisner ring of a simplicial complex $Δ$. Indeed, the differentials in the linear part are simply a compilation of restriction maps in the simplicial cohomology of induced subcomplexes of $Δ$. Along the way, we also show that if a monomial ideal has at least one generator of degree $2$, then the linear strand of its minimal free resolution can be written using only $\pm 1$ coefficients.

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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