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arXiv · 2203.05935

Analytic spread of filtrations on two dimensional normal local rings

Steven Dale Cutkosky
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Abstract

In this paper we prove that a classical theorem by McAdam about the analytic spread of an ideal in a Noetherian local ring continues to be true for divisorial filtrations on a two dimensional normal excellent local ring $R$, and that the Hilbert polynomial of the fiber cone of a divisorial filtration on $R$ has a Hilbert function which is the sum of a linear polynomial and a bounded function. We prove these theorems by first studying asymptotic properties of divisors on a resolution of singularities of the spectrum of $R$. The filtration of the symbolic powers of an ideal is an example of a divisorial filtration. Divisorial filtrations are often not Noetherian, giving a significant difference in the classical case of filtrations of powers of ideals and divisorial filtrations.

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Steven Dale Cutkosky. 2022-03-11. Analytic spread of filtrations on two dimensional normal local rings. https://arxiv.org/abs/2203.05935

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