Re: Mathematica question
- To: mathgroup at smc.vnet.net
- Subject: [mg124804] Re: Mathematica question
- From: Richard Fateman <fateman at cs.berkeley.edu>
- Date: Tue, 7 Feb 2012 04:06:16 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <jgo0h5$a3f$1@smc.vnet.net>
On 2/5/2012 11:46 PM, Howie wrote: > Let's say you've got an expression > > expr = {Sin[x] + x^2 - x^2*Cos[x], x^3 (1 + x^2) - x^3, x^4 - x^3} > > What does this mean? > > Table[expr[[j]] // FullSimplify[#, $assumptions]& /@ #& // Expand // > @ #&, {j, 3}] > > I am new to Mathematica as far as these more complicated expressions > are concerned. > > Can you explain symbol by symbol? > > I realize that the [[j]] is Part and that FullSimplify is applied // > Postfix to expr, but I don't understand what $assumptions means (I'm > assuming that these are some assumptions added to FullSimplify) but I > do not know where these assumptions come from. Are these assumptions > the rest of the stuff on the right-hand side? > > In reality I have a potentially much more complicated form of the > expr. > > Thanks! > > 1. Since you are new to Mathematica and obviously didn't write that expression, why don't you ask the person who you got it from to explain it? 2. Figure out a better 'subject' line for posts in the future.