English

Bounds on Continuous Scott Rank

Logic 2019-08-02 v1

Abstract

An analog of Nadel's effective bound for the continuous Scott rank of metric structures, developed by Ben Yaacov, Doucha, Nies, and Tsankov, will be established: Let L\mathscr{L} be a language of continuous logic with code L^\hat{\mathscr{L}}. Let Ω\Omega be a weak modulus of uniform continuity with code Ω^\hat{\Omega}. Let D\mathcal{D} be a countable L\mathscr{L}-pre-structure. Let Dˉ\bar{\mathcal{D}} denote the completion structure of D\mathcal{D}. Then SRΩ(Dˉ)ω1L^Ω^D\mathrm{SR}_\Omega(\bar{D}) \leq \omega_1^{\hat{\mathscr{L}}\oplus\hat{\Omega}\oplus\mathcal{D}}, the Church-Kleene ordinal relative to L^Ω^D\hat{\mathscr{L}}\oplus\hat{\Omega}\oplus\mathcal{D}.

Cite

@article{arxiv.1908.00179,
  title  = {Bounds on Continuous Scott Rank},
  author = {William Chan and Ruiyuan Chen},
  journal= {arXiv preprint arXiv:1908.00179},
  year   = {2019}
}
R2 v1 2026-06-23T10:36:52.207Z