Big q-Jacobi polynomials

The Big \( q \)-Jacobi polynomials are a family of orthogonal polynomials that are part of the larger theory of \( q \)-orthogonal polynomials. They are defined in terms of two parameters, often denoted as \( a \) and \( b \), and a third parameter \( q \) which is a real number between 0 and 1.