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arXiv · 2504.17734

Signed puzzles for Schubert coefficients

Igor Pak·Colleen Robichaux
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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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Igor Pak, Colleen Robichaux. 2026-07-10. Signed puzzles for Schubert coefficients. https://arxiv.org/abs/2504.17734

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