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Sorry if this is in the wrong sub-forum, I wasn't sure exactly where to place it.

I was wondering if there is an orthogonality relationship for the Legendre polynomials P[itex]^{0}_{n}[/itex](x) that have been converted to cylindrical coordinates from spherical coordinates, similar to the form where P[itex]^{0}_{n}(x)[/itex]P[itex]^{0}_{m}(x)[/itex] is integrated from x = -1 to x = 1.

By converted to cylindrical coordinates from spherical, I mean that originally x is taken as:

cos([itex]\varphi[/itex])

([itex]\varphi[/itex] being the angle between the z axis and the position vector (from the solution to Laplace's equation)),

and cos([itex]\varphi[/itex]) is replaced by [itex]\frac{z}{\sqrt{r^{2}+z^{2}}}[/itex].

Thanks, I appreciate the help.

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# Orthogonality Relationship for Legendre Polynomials in Cylindrical Coordinates

Can you offer guidance or do you also need help?

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