I apologize.
In haste, I made a typing error, and then I have been away from
computer for hours.
What I meant was,
realpart(nusum(exp(%i*k*x),k,1,N));
A dose of public humiliation helps!
Milan Lukic
Kamaraju Kusumanchi [02/06/04 19:54 -0400]:
> I am still not getting how to do it. Here is the sample session with maxima.
>
> (C1) realpart(nusum(j*x, j, 1, N));
>
> N (N + 1) x
> (D1) -----------
> 2
> (C2) realpart(nusum(j*j*x, j, 1, N));
>
> N (N + 1) (2 N + 1) x
> (D2) ---------------------
> 6
> (C3) realpart(nusum(cos(j/N)*x, j, 1, N));
>
> ERREXP1 NON-RATIONAL TERM RATIO TO NUSUM
> N
> ====
> \ j
> (D3) ( > COS(-)) x
> / N
> ====
> j = 1
>
> We can see that, D3 is left unsimplified.
>
> Milan Lukic wrote:
> >Have you tried
> > realpart(nusum(%i*j*x,j,1,N));
> >
> >Milan
> >
> >
> >Kamaraju Kusumanchi [02/06/04 14:45 -0400]:
> >
> >>Hi all
> >> I am interested in evaluating summation involving trigonometric terms
> >>using maxima. For example
> >>
> >>sum(cos(j/N), j, 1, N)
> >>
> >>Maxima does not give the simplified answer but gives expression
> >>involving summation sign. How to get the simplified result?
> >>
> >>I read the manual and came across simpsum : true flag. But this does not
> >>simplify the above expression. simpsum : true works only for Riemann
> >>kind of sums.
> >>
> >>Any ideas how to extend the sum function to trignometric terms also?
> >>
> >>thanks
> >>raju
> >>
>
>
> --
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>
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