> >> sage: axiom(maxima('1/2'))
> >> 1
> >> -
> >> 2
> >> sage: maxima(axiom('1/2'))
> >> -1
> > The only reason these examples work is by chance. The current
> > code was not designed to work this way, and this approach would
> > only work in general for the simplest of examples (such as integers
> > or rational numbers).
>
> That is not true. Exactly this sort of example was used to illustrate
> the original design of Sage.
AFAIK only interfaces Sage <-> $someothersystem are implemented and not
$someothersystem <-> $yetanothersystem. However, I think one could make it
work like this:
if isinstance(foo, ExpectElement) and not foo.parent() is self:
foosage = foo._sage_() # i.e. convert to Sage and then to the other system
return self(foosage)
Cheers,
Martin
--
name: Martin Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99
_www: http://www.informatik.uni-bremen.de/~malb
_jab: [EMAIL PROTECTED]
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