The Pelletier-Ressayre hidden symmetry for Littlewood-Richardson coefficients
Darij Grinberg·2020-08-14·via math.CO updates on arXiv.org
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.