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On the Hilbert vector of the Jacobian module of a plane curve
Portugaliae Mathematica ( IF 0.5 ) Pub Date : 2020-06-30 , DOI: 10.4171/pm/2038
Armando Cerminara 1 , Alexandru Dimca 2 , Giovanna Ilardi 1
Affiliation  

We identify several classes of curves $C:f=0$, for which the Hilbert vector of the Jacobian module $N(f)$ can be completely determined, namely the 3-syzygy curves, the maximal Tjurina curves and the nodal curves, having only rational irreducible components. A result due to Hartshorne, on the cohomology of some rank 2 vector bundles on $\mathbb{P}^2$, is used to get a sharp lower bound for the initial degree of the Jacobian module $N(f)$, under a semistability condition.

中文翻译:

关于平面曲线雅可比模的希尔伯特向量

我们确定了几类曲线 $C:f=0$,对于这些曲线可以完全确定雅可比模块 $N(f)$ 的希尔伯特向量,即 3-syzygy 曲线、最大 Tjurina 曲线和节点曲线,只有有理的不可约分量。由于 Hartshorne 的结果,在 $\mathbb{P}^2$ 上的一些秩 2 向量丛的上同调上,用于获得雅可比模块 $N(f)$ 的初始度的急剧下界,在半稳定状态。
更新日期:2020-06-30
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