Re: How to apply tags to expression terms?

*To*: mathgroup at smc.vnet.net*Subject*: [mg130499] Re: How to apply tags to expression terms?*From*: Bob Hanlon <hanlonr357 at gmail.com>*Date*: Tue, 16 Apr 2013 04:21:44 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <20130416043532.1F21F6A32@smc.vnet.net>

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 at 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 at iee.lu > > > > >

**References**:**How to apply tags to expression terms?***From:*Alexei Boulbitch <Alexei.Boulbitch@iee.lu>