arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1807.08021math.ACmath.CO
收藏

关于线性型的折叠积生成的理想

On ideals generated by fold products of linear forms

Stefan Tohaneanu

摘要:

设$\mathbb K$是特征为0的域。给定$n$的线性型在$R=\mathbb K[x_1,\ldots,x_k]$中,没有两个成比例,在我们的主要结果之一,我们表明,理想的$I\subset R$产生的所有$(n-2)$倍的产品,这些线性型具有线性分级自由分辨率。这个结果有助于确定$I$的对称理想的生成元的完整集合。通过西尔维斯特形式,我们可以从不同的角度分析二阶Orlik-Terao代数的表示理想的生成元;这是由所考虑的任何两个(不同的)线性型的乘积的倒数生成的代数。我们还表明,当$k=2$,和$n$的线性型的集合可能包含比例线性型,对于任何$1\leq a\leq n$,这些线性型的$a$ -倍的产品所产生的理想具有线性分级自由分辨率。

英文摘要:

Let $\mathbb K$ be a field of characteristic 0. Given $n$ linear forms in $R=\mathbb K[x_1,\ldots,x_k]$, with no two proportional, in one of our main results we show that the ideal $I\subset R$ generated by all $(n-2)$-fold products of these linear forms has linear graded free resolution. This result helps determining a complete set of generators of the symmetric ideal of $I$. Via Sylvester forms we can analyze from a different perspective the generators of the presentation ideal of the Orlik-Terao algebra of the second order; this is the algebra generated by the reciprocals of the products of any two (distinct) of the linear forms considered. We also show that when $k=2$, and when the collection of $n$ linear forms may contain proportional linear forms, for any $1\leq a\leq n$, the ideal generated by $a$-fold products of these linear forms has linear graded free resolution.

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。

↑