spherical harmonics

*To*: mathgroup at smc.vnet.net*Subject*: [mg129088] spherical harmonics*From*: agdijkstra at gmail.com*Date*: Fri, 14 Dec 2012 03:00:12 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net

I'm trying to do some Mathematica calculations with spherical harmonics. However, even testing the simple orthogonality relation does not work. code: Integrate[ SphericalHarmonicY[l, m, theta, phi] SphericalHarmonicY[lp, mp, theta, phi] Sin[theta], {theta, 0, Pi}, {phi, 0, 2 Pi}] adding the assumptions that l, m, lp and mp are integers does not help.