The Pelletier-Ressayre hidden symmetry for Littlewood-Richardson coefficients
published by Darij Grinberg
in 2020
and research's language is
English
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Abstract in English
We prove an identity for Littlewood--Richardson coefficients conjectured by Pelletier and Ressayre (arXiv:2005.09877). The proof relies on a novel birational involution defined over any semifield.