Algebraic interpretation of the two-variable Jacobi polynomials on the triangle: the pentagonal way

Nicolas Crampé, Quentin Labriet, Lucia Morey +3

The rank two Jacobi algebra ${\mathcal{J}}_2$ is used to provide an interpretation of the two-variable Jacobi polynomials $J_{n,k}^{(a,b,c)}(x,y)$ on the triangle, as overlaps betwee…