Question regarding expressions with Sum[...]

*To*: mathgroup at smc.vnet.net*Subject*: [mg7792] Question regarding expressions with Sum[...]*From*: Thomas Koerner <koerner at iis.ee.ethz.ch>*Date*: Tue, 8 Jul 1997 22:41:07 -0400*Organization*: Swiss Federal Institute of Technology (ETHZ)*Sender*: owner-wri-mathgroup at wolfram.com

I just started working with mathematica, and there is one thing I could not figure out yet ... Suppose I want to compute Sum[a[i],{i,0,n+1}] - Sum[a[i],{i,0,n}] with a[i] a series that I do not want to define in more detail. Is there a way of obtaining a[n+1] as the result ??? ________________________________________________________________________ Thomas Koerner, Dipl.-Phys. Tel: (01) 445 2434 (Switzerland) +411 445 2424 (Facsimile) +411 445 2434 (International) +411 445 2400 (Switchboard) 445 2400 (Secretary) E-Mail: koerner at iis.ee.ethz.ch Integrated Systems Laboratory Institut fuer Integrierte Systeme Technopark Zurich Technoparkstr. 1 CH-8005 Zurich