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Signed puzzles for Schubert coefficients

Published 24 Apr 2025 in math.CO | (2504.17734v1)

Abstract: We give a signed puzzle rule to compute Schubert coefficients. The rule is based on a careful analysis of Knutson's recurrence arXiv:math/0306304. We use the rule to prove polynomiality of the sums of Schubert coefficients with bounded number of inversions.

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