Re: Mathematica question

*To*: mathgroup at smc.vnet.net*Subject*: [mg124847] Re: Mathematica question*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Thu, 9 Feb 2012 05:39:24 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201202060739.CAA10233@smc.vnet.net>*Reply-to*: drmajorbob at yahoo.com

He won't miss it, I think. Bobby On Wed, 08 Feb 2012 16:37:51 -0600, Barrie Stokes <Barrie.Stokes at newcastle.edu.au> wrote: > Bobby > > You should give Churchill the credit for this comeback. ;-) > > Barrie > >>>> On 08/02/2012 at 9:28 pm, in message >>>> <201202081028.FAA06426 at smc.vnet.net>, > DrMajorBob <btreat1 at austin.rr.com> wrote: >> It's the sort of grammar up with which we should not put! >> >> Bobby >> >> On Tue, 07 Feb 2012 03:06:37 -0600, Murray Eisenberg >> <murray at math.umass.edu> wrote: >> >>> Yikes: it seems to me that's exactly the sort of expression combining >>> Postfix with the /@ special input form and pure functions that one >>> should _not_ write! >>> >>> The principal purpose of such special input forms should be to make >>> expressions easier to read (and write), not more. >>> >>> On 2/6/12 2:39 AM, 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! >>>> >>>> >>> >> > -- DrMajorBob at yahoo.com

**References**:**Mathematica question***From:*Howie <hcohl001@gmail.com>