From < http://reference.wolfram.com/mathematica/ref/LegendreP.html >, "LegendreP[n, m, a, z] gives Legendre functions of type a. The default is type 1." On Feb 5, 2013, at 6:04 AM, mathar <mathar at mpia-hd.mpg.de> wrote: > Which of the 4 arguments n, alpha, beta and x to the Legendre-P-Polynomials does Mma default?