>
> I'm not sure that IEEE is a good source for SymPy. IEEE's primary focus is
> numerics, SymPy is about symbolics.
> So while IEEE is definitely a good source of hints, we should check
> whether the reasoning behind each still holds in a symbolic context.
>
>
This is one of those borderline cases and Aaron said to go with the IEEE
(as I suppose that will avoid confusion between how Floats and floats
behave). That's good enough for me for now. So we get both nan**0 and
1**nan consistent and if we decide we don't like it it can be changed
later. All tests at present pass with the changes I've made.

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