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THE SYMMETRIC GROUP REPRESENTATION ON COHOMOLOGY OF THE REGULAR ELEMENTS OF A MAXIMAL TORUS OF THE SPECIAL LINEAR GROUP

Published online by Cambridge University Press:  01 February 2008

ANTHONY HENDERSON*
Affiliation:
School of Mathematics and Statistics, University of Sydney, NSW 2006, Australia (email: [email protected])
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Abstract

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We give a formula for the character of the representation of the symmetric group Sn on each isotypic component of the cohomology of the set of regular elements of a maximal torus of SLn, with respect to the action of the centre.

Type
Research Article
Copyright
Copyright © 2008 Australian Mathematical Society

References

[1]Blair, J. and Lehrer, G. I., ‘Cohomology actions and centralisers in unitary reflection groups’, Proc. London Math. Soc. (3) 83(3) (2001), 582604.Google Scholar
[2]Dimca, A. and Lehrer, G. I., ‘Purity and equivariant weight polynomials’, in: Algebraic groups and Lie groups, Australian Mathematical Society Lecture Series, 9 (Cambridge University Press, Cambridge, 1997), pp. 161181.Google Scholar
[3]Fleischmann, P. and Janiszczak, I., ‘The number of regular semisimple elements for Chevalley groups of classical type’, J. Algebra 155 (1993), 482528.CrossRefGoogle Scholar
[4]Hanlon, P., ‘The characters of the wreath product group acting on the homology groups of the Dowling lattices’, J. Algebra 91 (1984), 430463.CrossRefGoogle Scholar
[5]Henderson, A., ‘Representations of wreath products on cohomology of De Concini–Procesi compactifications’, Int. Math. Res. Not. 2004(20) (2004), 9831021.CrossRefGoogle Scholar
[6]Henderson, A., ‘Bases for certain cohomology representations of the symmetric group’, J. Algebraic Combin. 24(4) (2006), 361390.CrossRefGoogle Scholar
[7]Lehrer, G. I., ‘On hyperoctahedral hyperplane complements’, in: The Arcata Conf. on representations of finite groups (Arcata, CA, 1986), Proceedings of Symposia in Pure Mathematics, 47 (American Mathematical Society, Providence, RI, 1987), pp. 219234.Google Scholar
[8]Lehrer, G. I., ‘On the Poincaré series associated with Coxeter group actions on complements of hyperplanes’, J. London Math. Soc. (2) 36 (1987), 275294.Google Scholar
[9]Lehrer, G. I., ‘Poincaré polynomials for unitary reflection groups’, Invent. Math. 120 (1995), 411425.CrossRefGoogle Scholar
[10]Macdonald, I. G., Symmetric functions and Hall polynomials, 2nd edn (Oxford University Press, Oxford, 1995).Google Scholar