1. Elimination of ramification II: Henselian rationality
- Author
-
Franz-Viktor Kuhlmann
- Subjects
Model theory ,Algebraic function field ,Pure mathematics ,General Mathematics ,Ramification (botany) ,010102 general mathematics ,12J10 ,Rationality ,Field (mathematics) ,0102 computer and information sciences ,Function (mathematics) ,Transcendence degree ,Commutative Algebra (math.AC) ,Mathematics - Commutative Algebra ,01 natural sciences ,010201 computation theory & mathematics ,FOS: Mathematics ,0101 mathematics ,Uniformization (set theory) ,Mathematics - Abstract
We prove in arbitrary characteristic that an immediate valued algebraic function field $F$ of transcendence degree 1 over a tame field $K$ is contained in the henselization of $K(x)$ for a suitably chosen $x\in F$. This eliminates ramification in such valued function fields. We give generalizations of this result, relaxing the assumption on $K$. Our theorems have important applications to local uniformization and to the model theory of valued fields in positive and mixed characteristic., new improved version
- Published
- 2019