P. G. Kontorovich, A. D. Katsman, “Some types of elements of a semigroup invariant in a group”, Uspekhi Mat. Nauk, 1956, Volume 11, Issue 3(69),Pages <nobr>145

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Uspekhi Mat. Nauk, 1956 Volume 11, Issue 3(69), Pages 145–150 (Mi rm7799)

Scientific notes and problems

Some types of elements of a semigroup invariant in a group

P. G. Kontorovich, A. D. Katsman

Received: 03.06.1955

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