This is an elementary introduction to the representation theory of finite semigroups. We illustrate Clifford–Munn correspondence between representations a semigroup and its maximal subgroups. The emphasis throughout on naturally occurring examples.

*This article will be published in the Encyclopedia of Global Environmental Change, Volume 5: Social and Economic Dimensions of Global Environmental Change (GEC), Editor-in-Chief: Ted Munn (University of Toronto, Canada), Chichester, UK: John Wiley & Sons Ltd, http://www.wiley.co.uk, ISBN: 0471-97796 9.The volume is scheduled to appear in September 2001. WISSENSCHAFTSZENTRUM BERLIN FÜR SOZIALFO...

Munn [11] proved that the Jacobson radical of a commutative semigroup ring is nil provided that the radical of the coefficient ring is nil. This was generalized, for semigroup algebras satisfying polynomial identities, by Okniński [14] (cf. [15, Chapter 21]), and for semigroup rings of commutative semigroups with Noetherian rings of coefficients, by Jespers [4]. It would be interesting to obtai...

decisions in healthcare should be based on information obtained according to the principles of evidence-based medicine (ebm). an increasing number of systematic reviews are published which summarize the results of prevalence studies. interpretation of the results of these reviews should be accompanied by an appraisal of the methodological quality of the included data and studies. the critical a...

Decisions in healthcare should be based on information obtained according to the principles of Evidence-Based Medicine (EBM). An increasing number of systematic reviews are published which summarize the results of prevalence studies. Interpretation of the results of these reviews should be accompanied by an appraisal of the methodological quality of the included data and studies. The critical a...

This paper is concerned with the nature of category restrictions in across-the-board and parasitic gaps. Postal (1993) observes that parasitic gaps in English exhibit category restrictions but across-the-board gaps do not show such restrictions. Munn (2001) indicates that independent differences in the across-the-board and parasitic domains can account for category restrictions in parasitic gap...