Updates:
Cc: fredrik.johansson
Comment #3 on issue 1607 by ondrej.certik: evaluating functions with
singularity should not return a number
http://code.google.com/p/sympy/issues/detail?id=1607
Right, I agree that it should work. It just doesn't seem to react on the
precision, I
don't know why. I showed this during my tutorial (live), so I thought it
doesn't work:
In [1]: e = Integral(sin(x)/x, (x, -1, 1))
In [2]: e.evalf()
Out[2]: 1.9
In [3]: e.evalf(10)
Out[3]: 1.9
In [4]: e.evalf(100)
Out[4]: 1.9
Any ideas what is happening there?
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