Oct, 2017
Selectively sequentially pseudocompact group topologies on torsion and torsion-free Abelian groups
TOPOLOGY AND ITS APPLICATIONS
- ,
- Volume
- 230
- Number
- First page
- 562
- Last page
- 577
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1016/j.topol.2017.08.020
- Publisher
- ELSEVIER SCIENCE BV
A space X is selectively sequentially pseudocompact if for every family {U-n : n is an element of N} of non-empty open subsets of X, one can choose a point x(n) is an element of U-n for every n is an element of N in such a way that the sequence {x(n) : n is an element of N} has a convergent subsequence. Let G be a group from one of the following three classes: (i) V-free groups, where V is an arbitrary variety of Abelian groups; (ii) torsion Abelian groups; (iii) torsion free Abelian groups. Under the Singular Cardinal Hypothesis SCH, we prove that if G admits a pseudocompact group topology, then it can also be equipped with a selectively sequentially pseudocompact group topology. Since selectively sequentially pseudocompact spaces are strongly pseudocompact in the sense of Garcia-Ferreira and Ortiz-Castillo, this provides a strong positive (albeit partial) answer to a question of Garcia-Ferreira and Tomita. (C) 2017 Elsevier B.V. All rights reserved.
- Link information
- ID information
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- DOI : 10.1016/j.topol.2017.08.020
- ISSN : 0166-8641
- eISSN : 1879-3207
- Web of Science ID : WOS:000413130900045