On positivity in Hecke algebras
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M. J. Dyer; G. L. Lehrer
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Article
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1990
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Springer
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English
โ 425 KB
Let W be the Hecke algebra associated with a Coxeter system (W, R). The structure constants of Jf with respect to various bases are Laurent polynomials, whose coefficients enjoy remarkable positivity properties. We survey these and prove some new ones using the relationship between W and the geometr