The Protasov-Zelenyuk topology and ideal convergence
Group Theory
2025-12-04 v1 General Topology
Abstract
The so-called -sequences in a group , and the related finest Hausdorff group topology on that makes a null sequence, were introduced by Protasov and Zelenyuk 35 years ago and since then they became a fundamental tool in the field of topological groups. More recently, in the abelian case, the subfamily of -sequences called -sequences was introduced, as well as the finest precompact group topology that makes a null sequence. Here we study the counterpart of all these notions with respect to ideal convergence in place of the classical notion of convergence of a sequence. Also, we study their relation to the already established field of -characterized subgroups of compact abelian groups.
Keywords
Cite
@article{arxiv.2512.03885,
title = {The Protasov-Zelenyuk topology and ideal convergence},
author = {Lydia Außenhofer and Dikran Dikranjan and Anna Giordano Bruno},
journal= {arXiv preprint arXiv:2512.03885},
year = {2025}
}