integrate returns 0



On Thu, Oct 07, 2010 at 11:45:24AM -0500, Barton Willis wrote:
>
> [...]
> Also, I'd guess that you need to integrate s from -1 to 1, not -1 to -1:
> 
>   (%i21) integrate(integrate(psi(1,1,2*(1+r)/(1-s)-1,s,r,s)^2, r, -1, -s), 
> s, -1, 1);
>   (%o21) 1

Oops... indeed!  I made a typo and was integrating from -1 to
-1... which made the integral zero!

Everything works now.  Thanks for spotting this!

Regards,
Bart

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	"Share what you know.  Learn what you don't."