On Milnor–Orlik’s theorem and admissible simultaneous good resolutions

Let f be a (possibly Newton degenerate) weighted homogeneous polynomial defining an isolated surface singularity at the origin of C3, and let {fs} be a generic deformation of its coefficients such that fs is Newton non-degenerate for s/=0. We show that there exists an “admissible” simultaneous good resolution of the family of functions fs for all small s, including s=0 which corresponds to the (possibly Newton degenerate) function f. As an application, we give a new geometrical proof of a weak version of the Milnor–Orlik theorem that asserts that the monodromy zeta-function of f (and hence its Milnor number) is completely determined by its weight, its weighted degree and its Newton boundary.

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Publication Details

Journal
Annales Polonici Mathematici
Published
2025-08-12
DOI
https://doi.org/10.4064/ap250326-15-7
Primary Topic
Algebraic Geometry and Number Theory
Type
article
Field-Weighted Citation Impact
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article

On Milnor–Orlik’s theorem and admissible simultaneous good resolutions

Mutsuo Oka, Christophe Eyral
Annales Polonici Mathematici
Algebraic Geometry and Number Theory
article

On Milnor–Orlik’s theorem and admissible simultaneous good resolutions

Mutsuo Oka, Christophe Eyral
article en

Abstract

Let f be a (possibly Newton degenerate) weighted homogeneous polynomial defining an isolated surface singularity at the origin of C3, and let {fs} be a generic deformation of its coefficients such that fs is Newton non-degenerate for s/=0. We show that there exists an “admissible” simultaneous good resolution of the family of functions fs for all small s, including s=0 which corresponds to the (possibly Newton degenerate) function f. As an application, we give a new geometrical proof of a weak version of the Milnor–Orlik theorem that asserts that the monodromy zeta-function of f (and hence its Milnor number) is completely determined by its weight, its weighted degree and its Newton boundary.

Annales Polonici Mathematici
Tokyo Institute of Technology (JP), Institute of Mathematics (PL), Polish Academy of Sciences (PL)
Openalex Percentile: Top 74%
Algebraic Geometry and Number Theory
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On Milnor–Orlik’s theorem and admissible simultaneous good resolutions — Mutsuo Oka, Christophe Eyral · Annales Polonici Mathematici (2025) | TGRS Research Map | TGRS