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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
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