A Littlewood-Richardson rule for the MacDonald inner product and bimodules over wreath products

Abstract

We prove a Littlewood-Richardson type formula for (sλ/μ,s/)tk,t, the pairing of two skew Schur functions in the MacDonald inner product at q = tk for positive integers k. This pairing counts graded decomposition numbers in the representation theory of wreath products of the algebra C[x]/xk and symmetric groups.

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