English

Some pseudocompact-like properties in certain topological groups

General Topology 2021-09-01 v1

Abstract

We construct in ZFC a countably compact group without non-trivial convergent sequences of size 2c2^{\mathfrak{c}}, answering a question of Bellini, Rodrigues and Tomita. We also construct in ZFC a selectively pseudocompact group which is not countably pracompact, showing that these two properties are not equivalent in the class of topological groups. Using the same technique, we construct a group which has all powers selectively pseudocompact but is not countably pracompact, assuming the existence of a selective ultrafilter.

Keywords

Cite

@article{arxiv.2108.13505,
  title  = {Some pseudocompact-like properties in certain topological groups},
  author = {Artur Hideyuki Tomita and Juliane Trianon-Fraga},
  journal= {arXiv preprint arXiv:2108.13505},
  year   = {2021}
}
R2 v1 2026-06-24T05:32:43.613Z