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Hartfiel, Darald J. ; Maxson, Carlton J.
A matrix characterization of the maximal groups in $\beta_X$. (English). Czechoslovak Mathematical Journal, vol. 25 (1975), issue 2, pp. 274-278
MSC: 20M20 | MR 0369587 | Zbl 0313.18007 | DOI: 10.21136/CMJ.1975.101317
References:
[1] G. Birkhoff: Sobre los grupos de Automorfismos. Rev. Un. Math. Argentina, 11 (1946), 155-157.
[2] A. H. Clifford: A proof of the Montague-Plemmons-Schein theorem of maximal subgroups of a semigroup of binary relations. Semigroup Forum, Vol. 1 (1970), 272-275. DOI 10.1007/BF02573047 | MR 0267021
[3] J. S. Montague, R. J. Plemmons: Maximal subgroups of the semigroup of relations. J. of Algebra, 13 (1969), 575-587. DOI 10.1016/0021-8693(69)90119-7 | MR 0252539 | Zbl 0184.03703
[4] R. J. Plemmons, B. M. Schein: Groups of binary relations. Semigroup Forum, Vol. 1 (1970), 267-271. DOI 10.1007/BF02573046 | MR 0280632 | Zbl 0211.03901
[5] Stefan Schwarz: The semigroup of binary relations on a finite set. presented to the International Symposium on Semigroups, Bratislava, Czechoslovakia, June, 1968.
[6] Stefan Schwarz: On idempotent binary relations on a finite set. Czechoslovak Mathematical Journal, 20 (1970), 696-702. MR 0268047
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