[GiNaC-list] binomial coefficients

[Vladimir V. Kisil]

>>>>> On Tue, 7 Feb 2023 22:18:02 +0100, Marko Riedel <riedelmo at mathematik.uni-stuttgart.de> said:

    MR> Greetings.  I would like to point out that

    MR>     binomial(-5, -7)

    MR> will produce a segmentation fault. Compare to Maple which says
    MR> that when binomial(n,k) has k<0 but n-k>=0 we should use
    MR> binomial(n, n-k) which gives 15 in this case.

    If we want this feature to be added to GiNaC then the attached patch
  may do it.
-- 
Vladimir V. Kisil                 http://www1.maths.leeds.ac.uk/~kisilv/
  Book:      Geometry of Mobius Maps       https://doi.org/10.1142/p835
  Soft:      Geometry of cycles         http://moebinv.sourceforge.net/
  Jupyter notebooks:        https://github.com/vvkisil?tab=repositories

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