By the way, Maple behaves like SymPy:
> 1.0*x;
1.0 x
> x + 0.0;
x
Aaron Meurer
On Sat, Jul 23, 2011 at 7:52 PM, Aaron Meurer <[email protected]> wrote:
> Could you open an issue for this?
>
> Aaron Meurer
>
> On Sat, Jul 23, 2011 at 7:47 PM, Simon <[email protected]> wrote:
>> Matthew, I agree that the x + 0.0 case should be treated the same as 1.0 *
>> x.
>> I think that the Reals/floats should never automatically (outside of
>> possible internal routines) be converted to exact numbers.
>> What happens if you're doing a machine precision calculation that
>> occasionally reaches exactly 1.0 then gets converted to a slower exact
>> arithmetic?
>> I think that the mathematica convention (see below) is the correct one.
>>
>> IPython console for SymPy 0.7.0-git (Python 2.7.1-64-bit) (ground types:
>> python)
>> In [1]: 1.0 * x
>> Out[1]: 1.0⋅x
>> In [2]: x + 0.0
>> Out[2]: x
>> Mathematica 8.0 for Linux x86 (64-bit)
>> In[1]:= 1.0 * x
>> Out[1]= 1. x
>>
>> In[2]:= x + 0.0
>> Out[2]= 0. + x
>>
>> Simon
>>
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