I think it is just the numbers, a few letters, and some mathematical symbols.
See http://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts and also
the PDF linked to there. The only other option I can think of is to make
larger normal letters and make the default size letters the subscripts. You
could also try setting the display hook to a function like preview() that opens
a rendered formula in a PDF. It will be a little slower, but it should be
possible.
Another option would be to see if there is a font out there that has better
subscript support and require that for pretty printing within the module. Just
an idea, anyway.
On May 30, 2010, at 11:16 AM, Alan Bromborsky wrote:
> I am developing a sympy module for abstract tensor algebra and have the
> following question for displaying tensors. What subscripts and superscripts
> are available for simple printing via unicode. In my web searches it looks
> like the subscript letter set is very limited. Is there any reasonable
> alternative to LaTeX to display the tensors so that it could be done in an
> immediate mode from a python program. Also is there anyone would be
> interested in collaborating on such a project. What is the best way to
> collaborate before a module is ready for initial submission to sympy.
I've never collaborated on the same piece of code at the same time as someone
else before, but I think it should be easiest if you both use git and work on
top of each other's patches. In other words, git will make the merging of the
work as easy as possible. But probably others will have better advice.
Aaron Meurer
>
> The current status of the module is that I have implemented tensor addition,
> multiplication, contraction, and symmetrization for general abstract tensors.
> Tensors are instanciated from strings. For example 'R = Tensor('R_ijk__l')
> would instanciate a tensor with the same covariant and contravariant indexing
> as the Riemann tensor. The next thing I am doing is to impose given
> symmetries on a tensor such as the R is antisymmetric in i and j and in k and
> l.
>
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