Re: Symbolic summation
- To: mathgroup at smc.vnet.net
- Subject: [mg101592] Re: [mg101561] Symbolic summation
- From: Adriano Pascoletti <adriano.pascoletti at dimi.uniud.it>
- Date: Fri, 10 Jul 2009 23:21:50 -0400 (EDT)
- References: <200907101044.GAA15502@smc.vnet.net>
Sum[Subscript[k, l], {l, 2, n}]
Adriano Pascoletti
2009/7/10 Luca <Lucazanottifragonara at alice.it>
> Hello all, I have a problem, I've to compute a symbolic summation, which
> takes a very long time if I have to do it by hand. I have to write the terms
> of the Volterra series, related to the associated linear equation of a
> system.
>
> The problem is that I'm not really confident with mathematica, I've tried
> to use symbolic calculations with sums, but I think that in my case is not
> so easy.
>
> The problem is that I want a solution of this form:
>
> x1+x2+x3+x4+x5...
>
> Where the 1, 2, 3 and 4 and 5 are the summation subscripts...
>
> My summation is not infinite, I have to stop it.
>
> If I write something like this:
>
> n = 3;
>
> Sum[kl, {l, 2, n}]
>
> I obtain 2kl, instead I want to obtain k2+k3.
>
> Is it possible with mathematica?
>
>
- References:
- Symbolic summation
- From: Luca <Lucazanottifragonara@alice.it>
- Symbolic summation