Identity between Restricted Cauchy Sums for the $q$-Whittaker and Skew Schur Polynomials
Combinatorics
2024-07-17 v3 Mathematical Physics
math.MP
Probability
Abstract
The Cauchy identities play an important role in the theory of symmetric functions. It is known that Cauchy sums for the -Whittaker and the skew Schur polynomials produce the same factorized expressions modulo a -Pochhammer symbol. We consider the sums with restrictions on the length of the first rows for labels of both polynomials and prove an identity which relates them. The proof is based on techniques from integrable probability: we rewrite the identity in terms of two probability measures: the -Whittaker measure and the periodic Schur measure. The relation follows by comparing their Fredholm determinant formulas.
Keywords
Cite
@article{arxiv.2106.11913,
title = {Identity between Restricted Cauchy Sums for the $q$-Whittaker and Skew Schur Polynomials},
author = {Takashi Imamura and Matteo Mucciconi and Tomohiro Sasamoto},
journal= {arXiv preprint arXiv:2106.11913},
year = {2024}
}