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Congruences on a bisimple ω-semigroup

Published online by Cambridge University Press:  18 May 2009

W. D. Munn
Affiliation:
University of Glasgow, Glasgow, W.2
N. R. Reilly
Affiliation:
University of Glasgow, Glasgow, W.2
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In a semigroup S the set E of idempotents is partially ordered by the rule that e≦ƒ if and only if eƒ=ee. We say that S is an ω-semigroup if E={ei: i=0, 1, 2, …}, where

Bisimple ω-semigroups have been classified in [10]. From a group G and an endomorphism α of G a bisimple ω-semigroup S(G, α) can be constructed by a process described below in § 1: moreover, any bisimple ω-semigroup is isomorphic to one of this type.

Type
Research Article
Copyright
Copyright © Glasgow Mathematical Journal Trust 1966

References

REFERENCES

1.Clifford, A. H. and Preston, G. B., The algebraic theory of semigroups, Vol. I, Math. Surveys of the American Math, Soc. 7 (Providence, R.I., 1961).Google Scholar
2.Hall, M. JrThe theory of groups (New York, 1959).Google Scholar
3.Howie, J. M., The maximum idempotent-separating congruence on an inverse semigroup, Proc. Edinburgh Math. Soc. 14 (1964), 7179.Google Scholar
4.Howie, J. M. and Lallement, G., Certain fundamental congruences on a regular semigroup, Proc. Glasgow Math. Assoc. 7 (1966), 145159.CrossRefGoogle Scholar
5.Kurosh, A. G., The theory of groups, Vol. 1 (English translation, New York, 1955).Google Scholar
6.Lallement, G., Congruences et équivalences de Green sur un demi-groupe régulier, C. R. Acad. Sc. Paris Série A 262 (1966), 613616.Google Scholar
7.Munn, W. D., A class of irreducible matrix representations of an arbitrary inverse semigroup, Proc. Glasgow Math. Assoc. 5 (1961), 4148.CrossRefGoogle Scholar
8.Munn, W. D., Uniform semilattices and bisimple inverse semigroups, Quarterly J. Math. Oxford Ser. 2 (to appear).Google Scholar
9.Munn, W. D., The lattice of congruences on a bisimple ω-semigroup, Proc. Roy. Soc. Edinburgh (to appear).Google Scholar
10.Reilly, N. R., Bisimple ω-semigroups, Proc. Glasgow Math. Assoc. 7 (1966), 160169.Google Scholar