Hi,
On 23 October 2011 17:45, smichr <[email protected]> wrote:
> I found that cancel (even when there is nothing to cancel) does do
> something:
>
> >>> cancel(3.0*x+y**2-2)
> 3.0*x + 1.0*y**2 - 2.0
>
> I'm not sure if this is a bug or a feature, but it's something to be
> aware of.
>
This is a future, because the expression you cancel is converted to a
polynomial over real domain and when converted back to an expression,
Poly.as_expr() doesn't look for minimal representation of coefficients. Just
to note:
In [1]: 3.0*x + y**2 - 2.0
Out[1]:
2
3.0⋅x + y - 2.0
In [2]: cancel(_)
Out[2]:
2
3.0⋅x + 1.0⋅y - 2.0
In [3]: 1.0*y**2
Out[3]:
2
1.0⋅y
So, this is a natural thing in SymPy.
>
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>
Mateusz
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