On 19 July 2014 13:53, Waldek Hebisch <[email protected]> wrote:
> Bill Page wrote:
>> ...
>> The problem seems to occur very early than definite integrals. For
>> example one might want
>>
>> abs(x) = sqrt(x^2)
>>
>> Numerically this is the case
>
> Well, our main integrator works for complex functions. The
> relation above is not valid in such case.
>
If the integrator is intended to work with expressions representing
complex numbers then I would think that it should be possible to
symbolically represent conjugate. Then of course we could write
abs(x) = sqrt(x*conjugate(x))
However the issue of branches and branch-cuts remains.
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