On Sep 1, 1:30 pm, David Kirkby <david.kir...@onetel.net> wrote:
> On 1 September 2010 17:45, kcrisman <kcris...@gmail.com> wrote:
>
>
>
> > On Sep 1, 11:55 am, David Kirkby <david.kir...@onetel.net> wrote:
> >> Has anyone given thought for making Sage read Mathematica syntax? I've
> >> seen a recent video from William stating it is NOT an aim of Sage to
> >> be clone of any of the 4 M's - in contrast, Octave is a clone of
> >> MATLAB.
>
> <snip>
>
> >> Getting Sage to read Mathematica and do useful things with it, should
> >> make an interesting project for a computer science student. Although I
> >> don't know much about this, I would be guess this would have to be an
> >> MSc project, not an undergraduate one as I doubt doing any of this
> >> would be trivial.
>
> <snip>
>
> >> Has anyone got any comments?
>
> > whuss at some point added something like this for both Mma and Maple,
> > though very basic, as part of another ticket (symbolic sums?). I
> > can't remember where it is and am unfortunately having some internet
> > issues :( but anyway I believe this code was merged into Sage at some
> > point.
>
> > - kcrisman
>
> Unless I'm *very* mistaken, doing this would be a non-trivial project,
> so I doubt someone would have done it for both Mathematica and Maple
> as part of another ticket. But of course I may be wrong.
If I recall correctly, it was truly basic, and certainly likely to not
work in many situations - but for a few very specific purposes it was
better than nothing. I think the following was the relevant bit.
- kcrisman
sage: sage.calculus.calculus.symbolic_sum??
<snip>
#. Sage can currently only understand a subset of the output of
Maxima, Maple and
Mathematica, so even if the chosen backend can perform the
summation the
result might not be convertable into a Sage expression.
<snip>
sage: sage.interfaces.mathematica??
<snip>
def _sage_(self):
r"""
Try to convert a mathematica expression back to a Sage
expression.
This currently does not implement a parser for the Mathematica
output language,
therefore only very simple expressions will convert
successfully.
EXAMPLES::
sage: m = mathematica('x^2 +
5*y') # optional - mathematica
sage:
m.sage() # optional -
mathematica
x^2 + 5*y
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