On Apr 25, 12:23 am, Paul Zimmermann <paul.zimmerm...@loria.fr> wrote:
> Michael,
Hi Paul,
> > And Sage 3.4:
>
> > | Sage Version 3.4, Release Date: 2009-03-11 |
> > | Type notebook() for the GUI, and license() for information. |
> > ----------------------------------------------------------------------
> > sage: numerical_integral(sin(pi*cos(x/2)),0,2)[0]
> > 0.85397903781471396
>
> > So I cannot reproduce this. What platform are you on and are you using
> > a binary, build from source, etc?
>
> the example that failed has 'exp' instead of 'cos'. However with Sage 3.4
> it works for me:
>
> ----------------------------------------------------------------------
> | Sage Version 3.4, Release Date: 2009-03-11 |
> | Type notebook() for the GUI, and license() for information. |
> ----------------------------------------------------------------------
> sage: numerical_integral(sin(pi*exp(x/2)),0,2)[0]
> -0.43734547482524966
>
> Paul Zimmermann
I ran this on 3.4, 3.4.1 and a couple other rc releases in between:
sage: for i in (0..200):
....: numerical_integral(sin(pi*exp(x/2)),0,2)[0]
....:
and I could not get a failure. Note that the most likely culprit here
is clisp IMHO. Just today I found out that clisp 2.47 doesn't build on
the latest Mandriva release in 32 and 64 bit flavors. Oh well ...
We should have an Ubuntu 9.04 test image in the not too distant
future, so maybe we will hit it there.
Cheers,
Michael
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