Re: Eliminating common factors?

*To*: mathgroup at smc.vnet.net*Subject*: [mg93328] Re: [mg93299] Eliminating common factors?*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Tue, 4 Nov 2008 06:16:28 -0500 (EST)*Reply-to*: hanlonr at cox.net

In the simple form provided, just about any command that touches it will work. Without the actual expression there is no way to help. expr = 4 (a/4 + b/(4 c)) 4*(a/4 + b/(4*c)) expr // Simplify a + b/c expr // Apart a + b/c expr // Expand a + b/c expr // ExpandAll a + b/c expr // Cancel // Apart a + b/c expr // Together // Apart a + b/c expr // Factor // Apart a + b/c Bob Hanlon ---- AES <siegman at stanford.edu> wrote: ============= I have a simple, totally algebraic symbolic calculation that displays its output in the form (rewritten here using TeX notation) 4 ( {a \over 4 } + { b \over 4 c } ) where a, b and c are fairly simple products of purely algebraic quantities; \over is the TeX notation for a display fraction; and the curly brackets are just for TeX purposes and are not there in the actual output. Is there any Assumption for Simplify, or any other _simple_ way, to get rid of those (utterly!!!) superfluous 4's? [I suppose the real question is, why doesn't M cancel 'em the hell out in the first place?!?!] -- Bob Hanlon