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Abelian semigroups whose Stone-Čech compactifications have left ideal decompositions

Published online by Cambridge University Press:  24 October 2008

D. J. Parsons
Affiliation:
University of Sheffield†

Extract

Stone-Čech compactifications of semigroups have aroused a good deal of interest recently. Several authors, for example Milnes [6], Marcri [5] and Baker and Butcher [1], have concentrated on problems of the existence of continuous extensions to βS of the operation in a topological semigroup S. For a discrete semigroup a separately continuous extension always exists, and others such as Pym and Vasudeva[8] have studied the compactifications of particular classes of semigroups. Further interest has centred on the algebraic structure of these compactifications; see for example Hindman[3].

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1985

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References

REFERENCES

[1]Baker, J. W. and Butcher, R. J.. The Stone-Čech compactification of a topological semi group. Math. Proc. Cambridge Philos. Soc. 80 (1976), 102107.CrossRefGoogle Scholar
[2]Cohen, D. E.. Groups of Cohomological Dimension One. Lecture Notes in Math. vol. 245 (Springer-Verlag, 1972).CrossRefGoogle Scholar
[3]Hindman, N.. Minimal ideals and cancellation in βℕ. Semigroup Forum 25 (1982), 291310.CrossRefGoogle Scholar
[4]Howie, J. M.. An Introduction to Semigroup Theory (Academic Press, 1976).Google Scholar
[5]Macri, N.. The continuity of Arens product on the Stone-Čech compactification of semi groups. Trans. Amer. Math. Soc. 191 (1974), 185193.Google Scholar
[6]Milnes, P.. Compactifications of semitopological semigroups. J. Austral. Math. Soc. 15 (1973), 488503.CrossRefGoogle Scholar
[7]Parsons, D. J.. The centre of the second dual of a commutative semigroup algebra. Math. Proc. Cambridge Philos. Soc. 95 (1984), 7192.CrossRefGoogle Scholar
[8]Pym, J. S. and Vasudeva, H. L.. Semigroup structure in compactifications of ordered semi groups. Czech. Math. J. 27 (102) (1977), 528544.CrossRefGoogle Scholar
[9]Young, N. J.. The irregularity of multiplication in group algebras. Quart. J. Math. Oxford Ser. (2), 24 (1973), 5962.CrossRefGoogle Scholar