Region of integration for matrix valued orthogonal polynomials in three variables.
arXiv:1706.01927 : Matrix elements of irreducible representations of SU(n+1)xSU(n+1) and multivariable matrix-valued orthogonal polynomials.
Some videos of the zeros of orthogonal polynomials with respect to Bessel functions
arXiv:1406.0969: Zeros of polynomials that are orthogonal with respect to Bessel weight functions.

For ν=0.25.

For ν=1.

For ν=2.