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On coverings in the lattice of all group topologies of arbitrary Abelian groups. (Russian, English) Zbl 1150.54347
Sib. Mat. Zh. 47, No. 5, 961-973 (2006); translation in Sib. Math. J. 47, No. 5, 787-796 (2006).
Summary: The remainder of the completion of a topological Abelian group \((G,\tau_0)\) contains a nonzero element of prime order if and only if \(G\) admits a Hausdorff group topology \(\tau_1\) that precedes the given topology and is such that \((G,\tau_0)\) has no base of closed zero neighborhoods in \((G,\tau_1)\).
54H11 Topological groups (topological aspects)
54A10 Several topologies on one set (change of topology, comparison of topologies, lattices of topologies)
22A05 Structure of general topological groups
06B30 Topological lattices
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