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Re: Integrating SphericalHarmonicY


On Feb 7, 3:54 am, dh <d... at metrohm.ch> wrote:
> Hi,
>
> if you want to define a rule for this integral for symbolic l and m, you
>
> may define an Upvalue for e.g. Integrate:

Ok, I thought I might need to do something like this.  How do I make
sure that integral is only simplified when I have the correct
assumptions?

> > $Assumptions =
> >     {Element[Alternatives[theta,phi], Reals] &&
> >      Element[Alternatives[l,m], Integers] &&
> >      l >= Abs[m]}



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