The rank two Jacobi algebra
Mathematical Physics
2025-07-11 v1 math.MP
Abstract
The quadratic rank two Jacobi algebra is identified from the relations obeyed by the bispectral operators of the two variable Jacobi polynomials orthogonal on the triangle. It is seen to admit as subalgebras Racah and Jacobi algebras of rank one. The dual realizations in terms of differential operators in the variable representation and in terms of difference operators in the degree representation are provided. Structure relations for the two variable Jacobi polynomials are obtained as a by product.
Keywords
Cite
@article{arxiv.2507.07766,
title = {The rank two Jacobi algebra},
author = {Nicolas Crampe and Satoshi Tsujimoto and Luc Vinet and Alexei Zhedanov},
journal= {arXiv preprint arXiv:2507.07766},
year = {2025}
}