Updates:
Status: Fixed
Comment #5 on issue 2131 by [email protected]: failing limit
http://code.google.com/p/sympy/issues/detail?id=2131
It no longer raises a division by zero error:
limit(diff(x**3*sin(1/x), x) / x, x, 0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "sympy/series/limits.py", line 275, in limit
r = heuristics(e, z, z0, dir)
File "sympy/series/limits.py", line 299, in heuristics
raise PoleError(msg % (e, z, z0, dir))
sympy.core.function.PoleError: Don't know how to calculate the
limit((3*x**2*sin(1/x) - x*cos(1/x))/x, x, 0, dir=+), sorry.
According to goodok, the limit doesn't exist so raising a pole error seems
better than generating a division by zero error.
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