Hi,

On 16 June 2011 20:09, smichr <smi...@gmail.com> wrote:

> The exp(x)*exp(-x) term in the Poly should cancel, shouldn't it?
>    >>> Poly(exp(x) + exp(-x) - y)*exp(x)
>    Poly(-y*exp(x) + exp(-x)*exp(x) + exp(x)**2, y, exp(-x), exp(x),
>    domain='ZZ')
>

Polynomials can't contain negative exponents, so exp(x) and exp(-x) =
1/exp(x) are treated as two different generators.


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Mateusz

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