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chromatic symmetric function 1claw-free graphs 1counterexamples 1line graphs 1schur-positivity 1

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math.CO2026

Two infinite families of counterexamples to the Stanley--Gasharov conjecture

David G. L. Wang, K. Zhang, T. Y. Zhao

The paper identifies an infinite family of connected line graphs whose chromatic symmetric functions are not Schur‑positive, providing infinitely many counterexamples to the Stanle…