Hi all, I recently had a need for Jacobi polynomials with the property that
int(P(i, a, b, x)*P(j, a, b, x)*(1-x)^a*(1+b)^b, (x, -1, 1) = delta_ij as I could not find these in SymPy I've come up with the following: def norm_jacobi(n, a, b, x): G, F = sy.gamma, sy.factorial N2 = sy.S(2)**(a + b + 1)/(2*n + a + b + 1)\ * (G(n + a + 1)*G(n + b + 1))/(F(n)*G(n + a + b + 1)) return sy.jacobi(n, a, b, x) / sy.sqrt(N2) with the key element being the normalization factor. Would it be possible to get this upstream (it is a pain to code up!), for example as a norm=True kwarg? Regards, Freddie.
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