Date: Apr 16, 2013 4:21 AM
Author: Bob Hanlon
Subject: Re: How to apply tags to expression terms?

You might get "better" results using a default output form of

TraditionalForm (Mathematica | Preferences=85 | Evaluation | Format type of

new output cells: | TraditionalForm) or apply it manually, e.g.,

(x^2 - 1)/(x + 1) // Simplify // TraditionalForm

x - 1

(x^2 - 1)/(x + 1) // Cancel // TraditionalForm

x - 1

Bob Hanlon

On Tue, Apr 16, 2013 at 12:35 AM, Alexei Boulbitch

<Alexei.Boulbitch@iee.lu>wrote:

> Dear Community members,

>

> I often see on this site an at the StackExchange the repeating questions

> of how to rearrange some expression, that Mathematica "likes" to keep in

> one form, but the user prefers another one. It is like in this trivial

> example:

>

> (x^2 - 1)/(x + 1) // Simplify

>

> that Mathematica returns -1+x, rather than x-1 that might be wished by th=

e

> user.

>

> I have seen many answers to this questions, and gave few mine. The proble=

m

> here is that the answers are non-universal: they strongly depend upon the

> expression in question. Besides, they require some additional programming=

,

> and the more complex is the formula to sort, the longer will be the part =

of

> the sorting code.

>

> It seems that the problem of sorting terms of analytic expressions in the

> desired order might be solved, if one could assign tags to the terms to b=

e

> sorted, and then sort the terms according to a specified list of such tag=

s.

>

> Now comes my question, do you know how to apply tags to expression terms?

>

> I have seen an analogous functionality in the Presentation Master, the

> package of David Park. There, however, the tags are used to be assigned =

to

> sub expressions, the held part of the expression in question. David, is i=

t

> possible to assign tags to expressions that are not held?

>

> Thank you in advance.

> Alexei

>

> Alexei BOULBITCH, Dr., habil.

> IEE S.A.

> ZAE Weiergewan,

> 11, rue Edmond Reuter,

> L-5326 Contern, LUXEMBOURG

>

> Office phone : +352-2454-2566

> Office fax: +352-2454-3566

> mobile phone: +49 151 52 40 66 44

>

> e-mail: alexei.boulbitch@iee.lu

>

>

>

>

>