My guess is that limit() doesn't look at assumptions. Also, limit
uses real limits, not complex limits (which are much harder to work
with algorithmically).
The oo**zoo thing is a bug. Please open an issue in the issue tracker about it.
Aaron Meurer
On Mon, Jun 8, 2015 at 1:10 PM, Francesco Bonazzi
<franz.bona...@gmail.com> wrote:
> Are you sure that SymPy's behaviour is well-defined?
>
> In [1]: z = Symbol('z', imaginary=True)
>
> In [2]: z.is_imaginary
> Out[2]: True
>
> In [3]: z.is_real
> Out[3]: False
>
> In [4]: limit(1/z, z, 0)
> Out[4]: ∞
>
> In [5]: type(_)
> Out[5]: sympy.core.numbers.Infinity
>
>
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