Am Samstag, den 02.04.2011, 09:01 -0700 schrieb Richard Fateman:
> Commercial Macsyma asks "is x positive or negative". If positive,
> returns a large answer. If negative,
> returns the expression unintegrated.
>
> Mathematica 7.0 does not ask for the sign of x. I do not know if its
> answer is correct for all x.
>
> RJF
integrate(sqrt(x^5)*sqrt(1-x),x)
This type of integral is done in the routine chebyf which is called from
the integrator. It should be possible to generalize the routine chebyf
to handle these integrals more complete.
Dieter Kaiser