Abstract
It was shown in [3] that every finite group is the maximal subgroup of a semigroupB x of all binary relations on some finite set X. This result is extended here to arbitrary groups.
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Plemmons, R.J., Schein, B.M. Groups of binary relations. Semigroup Forum 1, 267–271 (1970). https://doi.org/10.1007/BF02573046
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DOI: https://doi.org/10.1007/BF02573046