Cardinality of open σ-Compact sets in the space of noncompact subgroups of a topological group
English version (Springer): Ukrainian Mathematical Journal 40 (1988), no. 6, pp 679-683.
Citation Example: Piskunov A. G. Cardinality of open σ-Compact sets in the space of noncompact subgroups of a topological group // Ukr. Mat. Zh. - 1988. - 40, № 6. - pp. 803-807.
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