Re: PC auto-simplifies output, but mac doesn't

*To*: mathgroup at smc.vnet.net*Subject*: [mg125720] Re: PC auto-simplifies output, but mac doesn't*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Fri, 30 Mar 2012 04:32:11 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <201203290758.CAA21741@smc.vnet.net> <4F74644E.8010009@math.umass.edu> <CABcK+QWUwckLzqCOuGxj2OVdd0fnBtjQwKa2gbVwT3Mn2Gn=Hw@mail.gmail.com>*Reply-to*: murray at math.umass.edu

To have Simplify act upon every output, set the global variable $Post: $Post = Simplify; Then, for example, evaluating x^2 + 2x y + y^2 will produce output: (x + y)^2 But do you _really_ want to simplify everything? Especially since that can cause a time penalty, something I should think you'd want to avoid while using Mathematica for note-taking. To unset $Post, do this: $Post = . On 3/29/12 9:42 AM, Peter Russo wrote: > I figured that there shouldn't be a difference. The person on the PC must > have accidentally set it to simplify without knowing it. How do you get > Simplify to be applied to all outputs? That could be very useful, but I > haven't been able to find it anywhere. Thanks > > On Thu, Mar 29, 2012 at 9:31 AM, Murray Eisenberg<murray at math.umass.edu>wrote: > >> There really should not be any difference between the two platforms -- >> unless possibly the expressions involved floating point reals. >> >> It is possible to cause Simplify to be applied to each and every output, >> but there would be utterly no difference as to how a PC and a Mac would be >> set by default. >> >> On 3/29/12 3:58 AM, peter.russo at gmail.com wrote: >> >>> In a class at my school, our professor gave us an example problem to try. >>> The output is a long complicated expression, but when "Simplify[]" is used, >>> it reduces to 0. Several people with macs all tried it, and we all got the >>> same thing. However, one person with a PC tried it and their original >>> output was simplified to 0. Is this an option that can be turned on on >>> Macs, to auto-simplify the output? Thanks >>> >>> >> -- >> Murray Eisenberg murray at math.umass.edu >> Mathematics& Statistics Dept. >> Lederle Graduate Research Tower phone 413 549-1020 (H) >> University of Massachusetts 413 545-2859 (W) >> 710 North Pleasant Street fax 413 545-1801 >> Amherst, MA 01003-9305 >> > > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**PC auto-simplifies output, but mac doesn't***From:*peter.russo@gmail.com