Syzygies in Hilbert schemes of complete intersections

preprint2023arXivOpen access

Abstract

Let e1,...,ec e_1, ..., e_c be positive integers and let Y⊆Pn Y \subseteq \mathbb{P}^n be the monomial complete intersection defined by the vanishing of x1e1,...,xcecx_1^{e_1}, ..., x_c^{e_c}. In this paper we study sharp upper bounds on the number of equations and syzygies of subschemes parametrized by the Hilbert scheme of points Hilbd(Y)Hilb^d(Y), and discuss applications to the Hilbert scheme of points Hilbd(X)Hilb^d(X) of arbitrary complete intersections X⊆PnX \subseteq \mathbb{P}^n.

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