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A counterexample to the Ross--Yong conjecture for Grothendieck polynomials (2403.14538v1)
Published 21 Mar 2024 in math.CO
Abstract: We give a minimal counterexample for a conjecture of Ross and Yong (2015) which proposes a K-Kohnert rule for Grothendieck polynomials. We conjecture a revised version of this rule. We then prove both rules hold in the $321$-avoiding case.
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