English

Model theoretic properties of metric valued fields

Logic 2013-05-08 v2

Abstract

We study model theoretic properties of valued fields (equipped with a real-valued multiplicative valuation), viewed as metric structures in continuous first order logic. For technical reasons we prefer to consider not the valued field (K,)(K,|{\cdot}|) directly, but rather the associated projective spaces K\bPnK\bP^n, as bounded metric structures. We show that the class of (projective spaces over) metric valued fields is elementary, with theory MVFMVF, and that the projective spaces \bPn\bP^n and \bPm\bP^m are bi\"interpretable for every n,m1n,m \geq 1. The theory MVFMVF admits a model completion ACMVFACMVF, the theory of algebraically closed metric valued fields (with a non trivial valuation). This theory is strictly stable (even up to perturbation). Similarly, we show that the theory of real closed metric valued fields, RCMVFRCMVF, is the model companion of the theory of formally real metric valued fields, and that it is dependent.

Keywords

Cite

@article{arxiv.0907.4560,
  title  = {Model theoretic properties of metric valued fields},
  author = {Itaï Ben Yaacov},
  journal= {arXiv preprint arXiv:0907.4560},
  year   = {2013}
}
R2 v1 2026-06-21T13:29:15.459Z