The Gotzmann Coefficients of Hilbert Functions

Details The Gotzmann Coefficients of Hilbert Functions The Gotzmann Coefficients of Hilbert Functions

2008-09-19

arxiv.org/abs/0809.3281v1

Mathematics

Commutative Algebra

Scientific paper

In this paper we investigate some algebraic and geometric consequences which arise from an extremal bound on the Hilbert function of the general hyperplane section of a variety (Green's Hyperplane Restriction Theorem). These geometric consequences improve some results in this direction first given by Green and extend others by Bigatti, Geramita, and Migliore. Other applications of our detailed investigation of how the Hilbert polynomial is written as a sum of binomials, are to conditions that must be satisfied by a polynomial if it is to be the Hilbert polynomial of a non-degenerate integral subscheme of $\mathbb P^n$ (a problem posed by R. Stanley). We also give some new restrictions on the Hilbert function of a zero dimensional reduced scheme with the Uniform Position Property.

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