[GiNaC-list] Given a formal iterated derivative (GiNaC::fderivative), what actually is it?
Vladimir V. Kisil
kisilv at maths.leeds.ac.uk
Sun Apr 10 00:23:43 CEST 2016
>>>>> On Sat, 9 Apr 2016 23:59:36 +0200, "Richard B. Kreckel" <kreckel at in.terlu.de> said:
>> f(x,y).diff(x, 3).diff(y, 2)
>> which is printed as
>> D[0,0,0,1,1](f)(x,y)
>> This is fantastic.
RK> Hmmm... Wouldn't it be more fantastic if it were printed
RK> D[x,x,x,y,y](f)(x,y)?
But how to print f(x+y,x-y).diff(x, 3).diff(y, 2) in this case?
--
Vladimir V. Kisil http://www.maths.leeds.ac.uk/~kisilv/
Book: Geometry of Mobius Transformations http://goo.gl/EaG2Vu
Software: Geometry of cycles http://moebinv.sourceforge.net/
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