The toric Hilbert scheme of a rank two lattice is smooth and irreducible

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The toric Hilbert scheme of a lattice L in Z^n is the multigraded Hilbert scheme parameterizing all ideals in k[x_1,...,x_n] with Hilbert function value one for every degree in the grading monoid N^n/L. In this paper we show that if L is two-dimensional, then the toric Hilbert scheme of L is smooth and irreducible. This result is false for lattices of dimension three and higher as the toric Hilbert scheme of a rank three lattice can be reducible.
19 pages, 4 figures

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Algebraic Geometry, Combinatorics

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http://salesiana.dossiersoluciones.com/handle/123456789/64658

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0208031
 http://arxiv.org/abs/math/0208031

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arXiv