Newton polyhedra, unstable faces and the poles of Igusa’s local zeta function
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- by Kathleen Hoornaert PDF
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Abstract:
In this paper we examine when the order of a pole of Igusa’s local zeta function associated to a polynomial $f$ is smaller than “expected”. We carry out this study in the case that $f$ is sufficiently non-degenerate with respect to its Newton polyhedron $\Gamma (f)$, and the main result of this paper is a proof of one of the conjectures of Denef and Sargos. Our technique consists in reducing our question about the polynomial $f$ to the same question about polynomials $f_\mu$, where $\mu$ are faces of $\Gamma (f)$ depending on the examined pole and $f_\mu$ is obtained from $f$ by throwing away all monomials of $f$ whose exponents do not belong to $\mu$. Secondly, we obtain a formula for Igusa’s local zeta function associated to a polynomial $f_\mu$, with $\mu$ unstable, which shows that, in this case, the upperbound for the order of the examined pole is obviously smaller than “expected”.References
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Additional Information
- Kathleen Hoornaert
- Affiliation: Department of Mathematics, Catholic University Leuven, Celestijnenlaan 200B, 3001 Leuven, Belgium
- Received by editor(s): March 12, 2002
- Published electronically: December 15, 2003
- © Copyright 2003 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 356 (2004), 1751-1779
- MSC (2000): Primary 11S40, 11D79; Secondary 14M25, 52B20, 14G10
- DOI: https://doi.org/10.1090/S0002-9947-03-03507-4
- MathSciNet review: 2031040