English

Topological Ramsey spaces and metrically Baire sets

Combinatorics 2014-06-27 v1

Abstract

We characterize a class of topological Ramsey spaces such that each element R\mathcal R of the class induces a collection {Rk}k<ω\{\mathcal R_k\}_{k<\omega} of projected spaces which have the property that every Baire set is Ramsey. Every projected space Rk\mathcal R_k is a subspace of the corresponding space of length-kk approximation sequences with the Tychonoff, equivalently metric, topology. This answers a question of S. Todorcevic and generalizes the results of Carlson \cite{Carlson}, Carlson-Simpson \cite{CarSim2}, Pr\"omel-Voigt \cite{PromVoi}, and Voigt \cite{Voigt}. We also present a new family of topological Ramsey spaces contained in the aforementioned class which generalize the spaces of ascending parameter words of Carlson-Simpson \cite{CarSim2} and Pr\"omel-Voigt \cite{PromVoi} and the spaces \FINm[]\FIN_m^{[\infty]}, 0<m<ω0<m<\omega, of block sequences defined by Todorcevic \cite{Todo}.

Keywords

Cite

@article{arxiv.1406.6918,
  title  = {Topological Ramsey spaces and metrically Baire sets},
  author = {Natasha Dobrinen and Jose G. Mijares},
  journal= {arXiv preprint arXiv:1406.6918},
  year   = {2014}
}

Comments

17 pp

R2 v1 2026-06-22T04:48:07.557Z