On Thu, Apr 24, 2008 at 3:51 PM, marco restelli <mrestelli at gmail.com> wrote:
> On Thu, Apr 24, 2008 at 3:39 PM, Richard Fateman
> <fateman at cs.berkeley.edu> wrote:
> > you haven't given enough info, but maybe you should try without ratsimp.
> > The taylor series should be integrable as a polynomial in s.
> > RJF
> >
>
> Richard,
> thank you for the suggestion. Unfortunately, avoiding ratsimp
> doesn't help: I have the same behavior with
>
>
> pT : taylor(p(s),s,0,0);
>
> pbar : integrate(pT,s,-l/2,l/2);
>
> (which works) and
>
>
> pT : taylor(p(s),s,0,1);
>
> pbar : integrate(pT,s,-l/2,l/2);
>
> (which doesn't). I am using Maxima 5.14.0. Please, let me know if
> there is any additional information I could provide.
>
> Best,
> Marco
Ok, here is some additional information:
(%i2) build_info();
Maxima version: 5.14.0
Maxima build date: 10:41 2/1/2008
host type: x86_64-pc-linux-gnu
lisp-implementation-type: GNU Common Lisp (GCL)
lisp-implementation-version: GCL 2.6.7
Marco
>
>
>
> >
> >
> >
> > > -----Original Message-----
> > > From: maxima-bounces at math.utexas.edu
> > > [mailto:maxima-bounces at math.utexas.edu] On Behalf Of marco restelli
> > > Sent: Thursday, April 24, 2008 6:09 AM
> > > To: maxima at math.utexas.edu
> > > Subject: Integral of Taylor expansions
> > >
> > > Dear list,
> > > I would like to use Taylor expansions to approximate integrals and
> > > I see the following problem:
> > >
> > > this trivial case works as expected, yielding p(0) l
> > > pT : taylor(p(s),s,0,0);
> > > pT : ratsimp(pT);
> > > pbar : integrate(pT,s,-l/2,l/2);
> > >
> > > but when I take
> > > pT : taylor(p(s),s,0,1);
> > > pT : ratsimp(pT);
> > > pbar : integrate(pT,s,-l/2,l/2);
> > > maxima starts computing and never delivers any result. Does anyone
> > > have a suggestion?
> > >
> > > Thank you!
> > > Marco
> > > _______________________________________________
> > > Maxima mailing list
> > > Maxima at math.utexas.edu
> > > http://www.math.utexas.edu/mailman/listinfo/maxima
> > >
> >
> >
>