Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 3536 by [email protected]: float NaN is not resolved with
other numbers
http://code.google.com/p/sympy/issues/detail?id=3536
from sympy.core.numbers import Float
from sympy.core.mul import Mul
flt_nan_obj = Float('nan')
i_obj = sympify('I')
res = Mul(flt_nan_obj, i_obj)
res
-nan*I
sympify(str(res))
nan
Actual: Results in float NaN multiplied by I
Expected: Results in NaN
Similar issues occur with other operators. This seems very unintuitive to
me because the built-in (non-float) NaN and float NaN are treated
differently.
Moreover, it seems like parts of sympy may not be equipped to handle the
resulting unreduced expression (see
http://code.google.com/p/sympy/issues/detail?id=3535).
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