Updates:
Cc: [email protected]
Comment #12 on issue 2476 by [email protected]: nth order Derivative
http://code.google.com/p/sympy/issues/detail?id=2476
By the way, can the chain rule be generalized to the nth order?
I was thinking about this. I never saw anything like that, but then
wikipedia comes to the rescue:
http://en.wikipedia.org/wiki/Fa%C3%A0_di_Bruno%27s_formula
It's surely much more complicated then the rule for products, but it's
implementable. Perhaps Saptarshi's work on combinatorics will fit right in
here.
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