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Kronecker coefficients and noncommutative super Schur functions
Journal article   Open access   Peer reviewed

Kronecker coefficients and noncommutative super Schur functions

Jonah Blasiak and Ricky Ini Liu
Journal of combinatorial theory. Series A, v 158, pp 315-361
Aug 2018
url
https://doi.org/10.1016/j.jcta.2018.02.007View
Published, Version of Record (VoR)Open Access (Publisher-Specific) Open

Abstract

Colored tableaux Kronecker coefficients Noncommutative Schur functions Super Schur functions
The theory of noncommutative Schur functions can be used to obtain positive combinatorial formulae for the Schur expansion of various classes of symmetric functions, as shown by Fomin and Greene [11]. We develop a theory of noncommutative super Schur functions and use it to prove a positive combinatorial rule for the Kronecker coefficients gλμν where one of the partitions is a hook, recovering previous results of the two authors [7,22]. This method also gives a precise connection between this rule and a heuristic for Kronecker coefficients first investigated by Lascoux [19].

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Domestic collaboration
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Mathematics
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