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arXiv 1612.03074math.AGmath.AC
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Hilbert格式的箭图和Plücker方程

Quivers and equations a la Plücker for the Hilbert scheme

Laurent Evain, Margherita Roggero

摘要:

几个模空间参数化的线性子空间的射影空间被切断的线性和二次方程在其自然嵌入:格拉斯曼,旗品种,舒伯特品种。本文的目的是证明一个类似的声明时,一个取代线性子空间与代数子计划的射影空间。我们展示的度1和2,示意性地定义的希尔伯特计划$\mathbf{Hilb}^{p}_{\mathbb P^n}$的所有(可能是非常数)希尔伯特多项式$p$的方程。这些方程让人想起格拉斯曼方程上的普吕克关系:它们是在普吕克坐标上的索引上进行排列而正式建立的。我们的方法依赖于一个新的建设的希尔伯特计划作为一个商的计划的一个符号表示。

英文摘要:

Several moduli spaces parametrizing linear subspaces of the projective space are cut out by linear and quadratic equations in their natural embedding: Grassmannians, Flag varieties, and Schubert varieties. The goal of this paper is to prove that a similar statement holds when one replaces linear subspaces with algebraic subschemes of the projective space. We exhibit equations of degree 1 and 2 that define schematically the Hilbert schemes $\mathbf{Hilb}^{p}_{\mathbb P^n}$ for all (possibly nonconstant) Hilbert polynomials $p$. The equations are reminiscent of the Plücker relations on the Grassmannians: they are built formally with permutations on indexes on the Plücker coordinates. Our method relies on a new construction of the Hilbert scheme as a quotient of a scheme of quiver representations.

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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