Abhyankar places admit local uniformization in any characteristic

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Abstract

We prove that every place P of an algebraic function field F|K of arbitrary characteristic admits local uniformization, provided that the sum of the rational rank of its value group and the transcendence degree of its residue field FP over K is equal to the transcendence degree of F|K, and the extension FP|K is separable. We generalize this result to the case where P dominates a regular local Nagata ring RK of Krull dimension dimR2, assuming that the valued field (K,vP) is defectless, the factor group vPF/vPK is torsion-free and the extension of residue fields FP|KP is separable. The results also include a form of monomialization.

Résumé

Nous montrons que toute place P d'un corps de fonctions algébrique F|K en caractéristique quelconque admet une uniformisation locale, pourvu que la somme du rang rationnel de son groupe de valeurs et du degré de transcendance de son corps résiduel FP sur K soit égal au degré de transcendance de F|K, et que l'extension FP|K soit séparable. Nous généralisons ce résultat au cas où P domine un anneau de Nagata local régulier RK de dimension de Krull au plus 2, en supposant que le corps valué (K,vP) soit sans défaut, que le groupe quotient vPF/vPK soit sans torsion, et que l'extension des corps résiduels FP|KP soit séparable. Les résultats contiennent aussi une forme de monomialisation.

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    1

    The author thanks Hans Schoutens, Peter Roquette, Dale Cutkosky and Olivier Piltant for many inspiring discussions.

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