#7377: Symbolic Ring to Maxima via EclObject
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Reporter: nbruin |
Owner: nbruin
Type: enhancement |
Status: needs_work
Priority: major |
Milestone: sage-feature
Component: symbolics |
Keywords:
Author: Nils Bruin, Jean-Pierre Flori |
Upstream: N/A
Reviewer: Jean-Pierre Flori, François Bissey, Karl-Dieter Crisman |
Merged:
Work_issues: |
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Comment(by nbruin):
Replying to [comment:68 jpflori]:
> Maxima transforms log(9!^x) back to log(9)*x before it is passed to
string function in max_to_string:
Thanks for locating the error! It's simply that maxima's {{{string}}} (in
lisp {{{$STRING}}}) does too much work, meaning that max_to_string
involves a new call to MEVAL. The definition is in {{{suprv1.lisp}}} and
points to what to do differently. Two definitions in maxima_lib.py need
adjusting:
{{{
maxprint=EclObject("(defun mstring-for-sage (form) (coerce (mstring form)
'string))").eval()
def max_to_string(s):
return maxprint(s).python()[1:-1]
}}}
WARNING: the routine maxprint is lisp, not maxima and is presently not run
under maxima-eval's control, so maxima errors will be poorly reported. If
converting maxima expressions to strings can trigger errors we need an
adjusted version of maxima-eval that calls EVAL rather than MEVAL on the
parameter (to execute lisp code under our replacement of maxima's
toplevel)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7377#comment:70>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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