Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.



Re: How to apply tags to expression terms?
Posted:
Apr 16, 2013 4:21 AM


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 x1 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 nonuniversal: 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, > L5326 Contern, LUXEMBOURG > > Office phone : +35224542566 > Office fax: +35224543566 > mobile phone: +49 151 52 40 66 44 > > email: alexei.boulbitch@iee.lu > > > > >



