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

Diane Maclagan; Rekha R. Thomas

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arXiv · math/0208031

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

Diane Maclagan·Rekha R. Thomas

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Abstract

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.

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BibTeX RIS

Diane Maclagan, Rekha R. Thomas. 2002-08-05. The toric Hilbert scheme of a rank two lattice is smooth and irreducible. https://arxiv.org/abs/math/0208031

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