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Results tagged with legendre-polynomials
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user 82588
6
votes
Accepted
Clausen’s identity for associated Legendre polynomials
There is a similar formula
$$
\small{\left(P_n^m(\cos\theta)\right)^2=(\sin{\theta})^{2m}\frac{(m+n)!}{(n-m)!}\sum_{k=0}^{n-m}\frac{(-1)^k}{4^{k+m}}\binom{n+m}{k+2m}\binom{n+k+m}{n+m}\binom{2k+2m}{k+ …
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