Pseudocompact group topologies with no infinite compact subsets

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Abstract

We show that every Abelian group satisfying a mild cardinal inequality admits a pseudocompact group topology from which all countable subgroups inherit the maximal totally bounded topology (we say that such a topology satisfies property {music sharp sign}).Every pseudocompact Abelian group G with cardinality |G|≤22c satisfies this inequality and therefore admits a pseudocompact group topology with property {music sharp sign}. Under the Singular Cardinal Hypothesis (SCH) this criterion can be combined with an analysis of the algebraic structure of pseudocompact groups to prove that every pseudocompact Abelian group admits a pseudocompact group topology with property {music sharp sign}.We also observe that pseudocompact Abelian groups with property {music sharp sign} contain no infinite compact subsets and are examples of Pontryagin reflexive precompact groups that are not compact. © 2010 Elsevier B.V.

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APA

Galindo, J., & Macario, S. (2011). Pseudocompact group topologies with no infinite compact subsets. Journal of Pure and Applied Algebra, 215(4), 655–663. https://doi.org/10.1016/j.jpaa.2010.06.014

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