JacobiP[n, a, b, x] gives the Jacobi polynomial .
Mathematical function (see Section A.3.10).
Explicit polynomials are given when possible.
satisfies the differential equation .
The Jacobi polynomials are orthogonal with weight function .
JacobiP[n, a, b, z] has a branch cut discontinuity in the complex z plane running from to .
See The Mathematica Book: Section 3.2.9.
See also: LegendreP, ChebyshevT, ChebyshevU, GegenbauerC.