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Re: integral

 From: Fred J. Subject: Re: integral Date: Sun, 21 Aug 2005 12:31:05 -0700 (PDT)

```

> Fred J. schrieb:
> > Hello
> >
> > I need to do an integration
> >
> > integrate_0^(x-1/2) integrate_(1/2+y)^0 12xy(1-y)
> dx
> > dy
> >
> > how can I use octave to do this. I have been
> > lot in the
> > first few pages of the manual but need to know if
> this
> > is even do-able
> > with octave?
>
> Hi Fred,
>
> Use e.g. the free symbolic CAS YaCAS, integrated in
> free EULER 2.11 (2.6 MB),
> URL:
>
http://mathsrv.ku-eichstaett.de/MGF/homes/grothmann/euler/
> and write at the YaCAS-Prompt (you must append the
> two greater sign >> at the
> Euler Prompt > ):
>
> >>> Simplify(Integrate(y,0,y-1/2)
> Integrate(x,1/2+y,0) 12*x*y*(1-y) ))
>
> Screenshot appended.
>
> Best
>           Wolfgang
> --
> privat:      Wolfgang Lindner, Stieglitzweg 6,
> D-42799 Leichlingen
>

thanks, I will check it, do you know wheather the
package you mentioned can calculate the "limits of
integration" from an in-equality condition and use
those limits for integration. say:
f(x,y)=12xy(1-y), 0<x<1, 0<y<1
(x/y) < 3
and what if (x/y)< a where again we get in symbolic
stuff.

thanks

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