RE: Product and Summation sign
- To: mathgroup at smc.vnet.net
- Subject: [mg66826] RE: [mg66788] Product and Summation sign
- From: "David Park" <djmp at earthlink.net>
- Date: Wed, 31 May 2006 06:31:46 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Larry, Just use a HoldForm to stop evaluation. Sum[x[i], {i, 1, 50}] // HoldForm If you wish to manipulate an expression within a HoldForm you can use rules, or you could try the ExpressionManipulation package at my web site below. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: actuary at mchsi.com [mailto:actuary at mchsi.com] To: mathgroup at smc.vnet.net While a Mathematica user for some time, use has been limited to number crunching and not symbolic manipulations. I started to remedy this over the weekend. I entered Sum[x[i],{i,1,50}] expecting to see a response with Summation sign. Instead the output was x[1}+x[2]+x[3]+..... What do I need to do to get output that includes the Summation sign? StandardForm was checked. Thanks. Larry