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arXiv 0808.3604math.AG
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关于Hilbert曲线格式的维数

On the dimension of the Hilbert scheme of curves

Dawei Chen

摘要:

考虑Hilbert格式的一个分支,其一般点对应于射影簇X中的一个d次亏格g光滑不可约非退化曲线。当X分别为P^3、P^4或P^4中的三重光滑二次曲面时,我们给出了这类分支维数的下界。从渐近的观点来看,如果我们固定d,让g变化,这些界限是有意义的。一些例子构造使用行列式品种,以显示在一定范围内的d和g的界限的锐度。所得结果也可用于研究刚性曲线。

英文摘要:

Consider a component of the Hilbert scheme whose general point corresponds to a degree d genus g smooth irreducible and nondegenerate curve in a projective variety X. We give lower bounds for the dimension of such a component when X is P^3, P^4 or a smooth quadric threefold in P^4 respectively. Those bounds make sense from the asymptotic viewpoint if we fix d and let g vary. Some examples are constructed using determinantal varieties to show the sharpness of the bounds for d and g in a certain range. The results can also be applied to study rigid curves.

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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