Re: [Maxima-discuss] simplify_sum leads to a wrong value

[Robert D. <rob...@gm...>]

On 2020-04-24, philippe <rou...@gm...> wrote:

> this problems looks for me equivalent to problems arising when combining
> taylor series of functions involving (-1)^n terms or only even/odd
> terms.  Could we  build a mecanism that converts a series :
>
> sum(an,n,0,inf)-> sum(sum(a[q*n+k],n,1,inf,k,0,q-1)
>
> so that a[q*n+k] will be a rational in q,n,k  ?

Well, I'm not sure how widely useful that would be ... I don't know how
common such problems are, and anyway it seems like simplify_sum should
handle it correctly (at least returning the input unchanged if
simplify_sum doesn't know how to simplify it). 

> do you want me to report it on https://sourceforge.net/p/maxima/bugs/

Yes, please. That would be very helpful.

best,

Robert Dodier