Updates:
Status: Valid
Cc: [email protected]
Comment #1 on issue 4133 by [email protected]: Suggestion: implement
classical orthogonal polynomials
http://code.google.com/p/sympy/issues/detail?id=4133
These are already implemented. See legendre, chebyshevt, chebyshevu,
jacobi, laguerre, and hermite. There is also gegenbauer. Those are the
symbolic versions (i.e., they support the identities like you mentioned).
Append "_poly" to the end of the name to get the version that generates the
explicit polynomial.
I'm not sure if the specific identity you mentioned is implemented,
however. I'll leave this open for that.
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