Mathematics > Algebraic Geometry
[Submitted on 3 May 2024]
Title:Gotzmann's persistence theorem for smooth projective toric varieties
View PDF HTML (experimental)Abstract:Gotzmann's persistence theorem enables us to confirm the Hilbert polynomial of a subscheme of projective space by checking the Hilbert function in just two points, regardless of the dimension of the ambient space. We generalise this result to products of projective spaces, and then extend our result to any smooth projective toric variety. In the case of products of projective spaces, the number of points depends solely on the Picard rank of the ambient space, rather than on the dimension. For a more general smooth projective toric variety this number depends on the number of Hilbert basis elements of the nef cone.
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