Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-Medium WrongResult
New issue 2662 by asmeurer: conjugate(x).diff(x) is wrong
http://code.google.com/p/sympy/issues/detail?id=2662
We have
In [5]: conjugate(x).diff(x)
Out[5]: 1
But according to Maple, it should be
diff(conjugate(x), x);
_
x
2 abs(1, x)
-
--- + -----------
x
signum(x)
where abs(1, x) means the first derivative of abs(x) (we use re() to
express this).
In theory, this is easy to fix, but I don't know if changing this will
break any tests of integrating functions with conjugates, since the
integrator relies heavily on the derivative of expressions.
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