Comment #16 on issue 564 by [email protected]: series expansion of acosh and
acoth
http://code.google.com/p/sympy/issues/detail?id=564
A agree that default plane for function's result can be considered as
complex plane, but I am not sure that it is the straight consequence from
the knowledge of that that symbols are complex by default.
I am worry about that, because I plan to involved in sympy split-complex
numbers.
And it is interesting how can I switch, with the help of assumptions, the
field of the functions's result, in the case of when supplying arguments
are *strictly real*. e.g. real zero.
And about `new assumptions`. Is it that what is described in issue 1047 ?
btw:
S.Zero.is_complex
True
1/S.Zero
oo
Or I do not understand `is_complex` attribute, or it is must be return zoo
by the above assumptions.
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