On Sat, Aug 30, 2008 at 11:15 AM, Robert Dodier <[EMAIL PROTECTED]> wrote:
> Dunno if it matters but maybe you can handle this directly in Maxima.
>
> foo : sum (1/(k + m)^3, k, 1, inf);
>
> load (simplify_sum);
> simplify_sum (foo);
> => -psi[2](m+1)/2
>
> ev (%, m=2);
> => zeta(3)-9/8
>
> ev (%, numer);
> => .07705690315959424
>
> Maybe there's a convenient way to do that through Sage, I don't know.
Thanks Robert! Here's one way to do this from Sage.
sage: maxima.load('simplify_sum')
"/opt/sage/local/share/maxima/5.16.2/share/contrib/solve_rec/simplify_sum.mac"
sage: maxima.simplify_sum(maxima('sum(1/(k+m)^3,k,1,inf)'))
-psi[2](m+1)/2
--Mike
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