Integrating SphericalHarmonicY

*To*: mathgroup at smc.vnet.net*Subject*: [mg73181] Integrating SphericalHarmonicY*From*: wgempel at yahoo.com*Date*: Tue, 6 Feb 2007 03:47:09 -0500 (EST)

I would like Integrate[ Conjugate[SphericalHarmonicY[l,m,theta,phi]] SphericalHarmonicY[l,m,theta,phi] Sin[theta], {theta, 0, Pi}, {phi, 0, 2 Pi}] to evaluate to 1 (without having to force it through a rule every time). I have tried $Assumptions = {Element[Alternatives[theta,phi], Reals] && Element[Alternatives[l,m], Integers] && l >= Abs[m]} Thanks for any help.