#16785: derivative operator translation to maxima
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Reporter: nbruin | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: interfaces | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Currently, we are failing to properly convert certain expressions to
maxima when they contain differential operators:
{{{
sage: function('f')
sage: maxima_calculus(f(x).diff(x))
'diff(f(_SAGE_VAR_x),_SAGE_VAR_x,1)
sage: maxima_calculus(f(x+1).diff(x)) #this is bad!
?%at('diff(f(t0),t0,1),[t0=x+1])
}}}
note the bare `x` in the bottom line. That should be a `_SAGE_VAR_`.
As it turns out, a lot of conversion here is happening with string
manipulations, circumventing the standard conversion machinery. That also
means that functions that have a non-trivial `_maxima_init_evaled_` will
not get translated using it. It's better to do everything using the
standard conversion.
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Ticket URL: <http://trac.sagemath.org/ticket/16785>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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