Hi,
I was doing some symbolic integration and found a strange result. (I'm
using stable sympy 0.7.1. Sorry for the noise if this is a well known issue
already reported)
I symbolically integrate a function f
>>> f = symbols('f', cls=Function)
>>> t, x = symbols('t x')
>>> J = f(t).integrate((t,0,x))
>>> print J
Integral(f(t), (t, 0, x)) # fine
Now, when I differentiate J(x) :
>>> print J.diff(x)
f(x) + Integral(0, (t, 0, x))
I would have expected to get just f(x), and indeed the second term seems to
be zero, isn't it ?
Is there some additional command that I should call (I'm fairly new with
sympy). I tried simplify, without success.
Best,
Pierre
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