[Maxima] ratexpand + pochhammer
willisb at unk.edu
Fri Mar 13 14:18:32 CDT 2009
maxima-bounces at math.utexas.edu wrote on 03/13/2009 01:48:57 PM:
> I have used pochhammer a lot for negative n too:
> Pochhammer(a,-2) --> 1/((1-a) (2-a))
> But there is a small problem. A lot of calculations which involve
> more than one
> pochhammer function with positive and negative n would simplify
> Pochhammer(a,-2) would give 1((a-2) (a-1))
> To achieve this representation I have factored the result of pochhammer
> negative n in some calculations.
> Dieter Kaiser
Ahh, yes. There is a better reflection formula. I'll change this (not for
the next release).
The revised simp-pochhammer will give the rectangular form for the pure
without using rectform (thanks to numeric.lisp). And I think I'll change
the code so that
max_pochhammer_index < -1 prevents all expansion, but otherwise not change
pochhammer works (or doesn't work :( .
Thanks for the suggestion.
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