Re: canonical mathematical expression represenation?

*To*: mathgroup at smc.vnet.net*Subject*: [mg52508] Re: canonical mathematical expression represenation?*From*: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>*Date*: Tue, 30 Nov 2004 05:24:17 -0500 (EST)*References*: <coefjk$rf3$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

There are various wrappers that you can use to control the way Mathematica expressions are formatted which you can find one the Cell | Display As... menu item. The one you want is TraditionalForm which you can use in-line thus: Sum[a^k, {k, 0, M}]//TraditionalForm If you want to wrap all of your outputs in TraditionalForm then you can do the following: $PrePrint=TraditionalForm[#]&; in which case Sum[a^k, {k, 0, M}] (and everything else) will be traditionally formatted. Steve Luttrell "nospam nospam" <nospam_please at nospam.com> wrote in message news:coefjk$rf3$1 at smc.vnet.net... >I noticed that Mathematica represents expressions with > some specific 'way' or order. > > For example, > > Sum[a^k, {k, 0, M}] > > gives > -1 + a^(1+M) > ------------- > -1 + a > > > How can I make it display the expression, in what I would consider > a more 'natural' way, as follows > > 1 - a^(1+M) > ------------- > 1 - a > > I am sure there is a way to do, and why do you think > Mathematica does it the way it does? what is the logic > of how it represents things? is there a command to convert > the first output to the second? I tried few commands, but > can not figure it out. > > thank you, > --nospam >