Changes between Version 4 and Version 5 of Ticket #9706, comment 112


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Timestamp:
12/09/13 20:26:58 (8 years ago)
Author:
maldun
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  • Ticket #9706, comment 112

    v4 v5  
    2020
    2121You evaluate numerical expressions for n in NN with recursion. this is favorable for chebyshev polynomials, but not for all ortho polys you can evaluate numeric values in O(log n). You have already problems with the legendre polynomials, since the coefficients depend on n, and the recursion is not stable. Thus other evaluation methods should be used. Thats the reason why _evalf_ with mpmath should come first.
    22 In case of chebyshev I catched this with call of the recursion.
     22In case of chebyshev I catched this with an explicit call of the recursion in _evalf_.
    2323
    2424The _old_maxima_ method is used for some oddballs, where the only useful implementation is in maxima, and for some special cases. So removing is probably not a good idea.