Re: [Maxima-discuss] negative exponent

[Stavros M. (Σ. Μ. <mac...@al...>]

There is no standard way of doing that as far as I know.

But I've made a few changes to the output formatting routines which will
allow you to customize this behavior.

Just save the attached file somewhere then load("<full pathname>").

Then the variable showasnegexp will control this behavior:

Controls displaying A^-B as 1/A^B, where A is a mapatom.
If true, always displays as A^-B.
If false, never.
If a list of mapatoms, those are displayed as A^-B.

​For example:

​showasnegexp: [x]$

a/x => a*x^-1           << because x is in the list
1/a*1/x => x^-1/a​
​
​     << because a is not in the list
1/(1+x) => 1/(1+x)   << only variables, not expressions, displayed like this

showasnegexp: true$

​​
a/x => a*x^-1
1/a*1/x => a^-1*x^-1   << all variables shown like this


Hope this is useful. Feedback welcome.

           -s


On Thu, Nov 3, 2016 at 11:23 AM, Graeme Paterson <gp...@ms...> wrote:

> On 11/3/2016 8:25 AM, Stavros Macrakis (Σταῦρος Μακράκης) wrote:
> > Please reply to the list; different people have different areas of
> > expertise. For example, I know nothing about wxMaxima.
> >
> > tex() (and for that matter string()) do respect exptdispflag, so the
> > necessary hooks are there.
> >
> >           -s
> >
> > On Wed, Nov 2, 2016 at 8:05 AM, Graeme Paterson <gp...@ms...
> > <mailto:gp...@ms...>> wrote:
> >
> >     On 11/1/2016 1:38 PM, Stavros Macrakis (Σταῦρος Μακράκης) wrote:
> >     > Does exptdispflag:false do what you want?:
> >     >
> >     > (%i1) exptdispflag:false$
> >     >
> >     > (%i2) (x+1)/(x-1);
> >     >
> >     >              - 1
> >     > (%o2) (x - 1)    (x + 1)
> >     >
> >     > (%i3) (x+1)+1/(x+2);
> >     >
> >     >              - 1
> >     > (%o3) (x + 2)    + x + 1
>
> No. In your examples I want the negative exponent to only apply to x as
> in x^-1
>
>
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