On Tue, Nov 11, 2008 at 3:15 AM, cesarnda <[EMAIL PROTECTED]> wrote:
>
> that is the output I was expecting, but it is not the input I gave.
> Obviously,
> 1/x - 1/(x+1) = 1/(x*(x+1))
>
> but, if the right hand side can be done why the left hand side can't?
> This is the bug I was talking about...

It probably depends on the algorithm, in sympy, it's currently the
other way round:

In [2]: sum(1/x - 1/(x+1), (x, 1, oo))
Out[2]: 1

In [3]: sum(1/(x*(x+1)), (x, 1, oo))
Out[3]: Sum(1/(x*(1 + x)), (x, 1, oo))


Ondrej

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