You are free to add facilities to the display formatting program to do
whatever you wish. For example, you can provide a display for all 4 corners.
(Pre superscripting, etc.) You can make up your notation and implement the
display and the TeX output.
For example, you could have scripting(alpha,[a],[b,c],d,e) display as
d b,c
alpha
e a
It is unrealistic to expect someone else to do this (free, anyway).
RJF
> -----Original Message-----
> From: maxima-bounces at math.utexas.edu
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of Vadim
> Sent: Thursday, May 17, 2007 7:40 AM
> To: Andrey G. Grozin
> Cc: maxima at math.utexas.edu
> Subject: Re: [Maxima] how do I use upper indicies in Maxima?
>
> Andrey G. Grozin wrote:
>
> > On Thu, 17 May 2007, Vadim wrote:
> >
> >> in TexMacs when I do
> >> alpha[0];
> >> I see small greek letter alpha with lower index zero.
> >
> > I think you should distinguish computations in the maxima
> language and
> > typesetting (though front-ends like TeXmacs try to minimize the
> > difference, it never actually disappear). While you are doing
> > computations and maxima programming, don't bother too much about
> > typesetting; when you fine-tune typesetting for a final publication,
> > don't do computations.
>
>
> I do computations, but TeXmacs interface is so much appealng,
> so I tried
> to catch both aspects simultaneously.
>
>
> >
> > I particular, alpha[0] is not a variable, from the point of view of
> > maxima language. It is an array reference to which no value has been
> > assigned. In most cases, it can be used just like a
> variable, but not
> > always.
>
>
> I was aware that a[i] means i-th element of array.
> However Maxima's output (both ascii-art and tex) gives an
> idea of using
> arrays elements as indexed variables.
> So I thought of this as of design decision.
>
> >
> >> 1. How do I specify *upper* indicies?
> >
> > No way. The TeXmacs-maxima interface tries to ensure that the output
> > can be cut-and-pasted into an input; an upper index would be
> > interpreted as raising to a power.
> >
> > Tensor packages have their own concept of upper and lower indices.
> > There are some functions to display tensor expressions with indices.
> > If you want tensors, use one of the tensor packages
> available in maxima.
>
>
> this makes much sence.
>
> However, given that array indexes are shown by Maxima as subscripted,
> then I humbly come with a design proposal.
> Is it possible for Maxima to show array-indexes superscripted if they
> are starting with underscore "_"?
>
>
> >
> > If you need an array with 2 indices, use an array:
> alpha[i,j]. If you
> > need a variable, use a variable: alphaij or alpha_i_j or whatever.
>
>
> BTW TeXmacs displays alpha_i_j as
> alpha'i'j
>
> Is there any interpretation of such displaying?
>
> Thank you.
> Vadim.
>
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