Abstract
For finitep-groupsG we study the conjugation representation γG which is defined by lettingG act on itself by conjugation. Roth conjectured that every irreducible representation ofG which is trivial on the center ofG, occurs in γG. However, this is not true in general. We construct minimal counterexamples and verify Roth's conjecture for various classes of finitep-groups, for instance those of maximal class.
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References
Blackburn, N.: On a special class ofp-groups Acta Math.100, 45–92 (1958)
Burnside, W.: On the outer automorphisms of a group. Proc. London Math. Soc. (2)11, 40–42 (1913)
Curtis, C.W., Reiner, I.: Representation theory of finite groups and associative algebras. New York: Interscience 1962
Feit, W.: Characters of finite groups. New York—Amsterdam, Benjamin 1967
Formanek, E.: The conjugation representation and fusionless extensions. Proc. Amer. Math. Soc.30, 73–74 (1971)
Frame, J.S.: On the reduction of the conjugating representation of a finite group. Bull. Amer. Math. Soc.53, 584–589 (1948)
Huppert, B.: Endliche Gruppen I. Berlin-Heidelberg-New York: Springer 1967
Moskowitz, M.: On a certain representation of a compact group. J. Pure Appl. Algebra36, 159–165 (1985)
Roth, R.L.: On the conjugating representation of a finite group. Pacific J. Math.35, 515–521, (1971)
Solomon, L.: On the sum of the elements in the character table of a finite group. Proc. Amer. Math. Soc.12, 962–963 (1961)
Wall, G.E.: Finite groups with class-preserving outer automorphisms. J. London Math. Soc.22, 315–320 (1947)
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Dedicated to Professor George Maltese on the occasion of his 60th birthday
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Kaniuth, E., Markfort, A. Irreducible subrepresentations of the conjugation representation of finitep-groups. Manuscripta Math 74, 161–175 (1992). https://doi.org/10.1007/BF02567665
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DOI: https://doi.org/10.1007/BF02567665