Non UBC
DSpace
Guevara Parra, Francisco
2019-05-22T09:23:23Z
2018-11-22T09:46
In [4] the authors used the Local Ramsey theory to prove that a countable Frechet group is metrizable if, and only if, its topology is analytic. We use this result together with the connections between the Tukey ordering and topology found in [2] to give a characterization of separable metrizable groups. We prove that a separable group is metrizable if, and only if, it is Frechet and the the ideal of converging sequences to the identity is Tukey below some basic order that is analytic. Results in this direction have been obtained before in [1].
<br> [1] S. Gabriyelyan, J. Kakol and A. Leiderman. On topological groups with a small base and metrizability. Fundamenta Mathematicae, 229 (2015) 129-157.
<br>[2] S. Solecki and S. Todorcevic. Cofinal types of topological directed orders. Ann. Inst. Fourier, Grenoble, 54, 6 (2004), 1877-1911.
<br>[3] S. Todorcevic. Introduction to Ramsey spaces. Annals of Mathematics Studies, No 174, Princeton, 2010.
<br>[4] S. Todorcevic and C. Uzcategui. Analytic $k$-spaces. Topology and its applications, 146-147 (2005) 511-526.
\end{thebibliography}
https://circle.library.ubc.ca/rest/handle/2429/70239?expand=metadata
29.0
video/mp4
Author affiliation: University of Toronto
Banff (Alta.)
10.14288/1.0378895
eng
Unreviewed
Vancouver : University of British Columbia Library
Banff International Research Station for Mathematical Innovation and Discovery
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
Graduate
BIRS Workshop Lecture Videos (Banff, Alta)
Mathematics
Mathematical logic and foundations
Combinatorics
Tukey reducibility and metrizable groups
Moving Image
http://hdl.handle.net/2429/70239