Abstract
We consider groups satisfying the following condition: Any subgroup of such a group that can be complemented in a larger subgroup can also be complemented in the entire group. A complete description of such groups is obtained under some weak conditions of finiteness.
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Chernikov, N.S., Malan’ina, G.A. One condition of complementability in groups. Ukr Math J 48, 1609–1617 (1996). https://doi.org/10.1007/BF02377828
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DOI: https://doi.org/10.1007/BF02377828