Re: Simplify
- To: mathgroup at smc.vnet.net
- Subject: [mg28631] Re: Simplify
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 3 May 2001 04:28:22 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <9cfrf2$gm1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Denis Ubozhenko wrote:
>
> Hallo, all
>
> Please, tell me.
> How can i simplify this:
>
> 1) Sum[b[k],{k,0,i-1}]+b[i] = = Sum[b[k],{k,0,i}]
> 2) (i<=5 or i>=6), i=Integers
>
> deonis : deonis at farlep.dp.ua
Hi,
Sum[b[k], {k, 0, i}] /.
Sum[a_, {j_, 0, k_}] :> Sum[a, {j, 0, k - 1}] + (a /. (j -> k))
Regards
Jens