#7661: maxima interface gives precedence to function dictionary instead of local
variables
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Reporter: burcin | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.3
Component: interfaces | Keywords: maxima
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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From the sage-devel thread:
http://groups.google.com/group/sage-devel/t/c89582242c83a349
{{{
On Fri, 11 Dec 2009 13:46:31 +0100
Nathann Cohen <[email protected]> wrote:
> sage: var('delta k')
> sage: m1=2*delta**2 + 2**2*delta*k
> sage: n=delta*k+2
> sage: m2=(2*delta)**2+(k-1)*4
> sage: m=(delta+delta*k-(delta-1))
> sage: ((m1/n)-(m2/n)).expand().simplify()
}}}
On 4.3.rc0, I get this:
{{{
TypeError: unsupported operand parent(s) for '*': 'Symbolic Ring' and
'<class 'sage.functions.generalized.FunctionDiracDelta'>'
}}}
The Maxima interface seems to give precedence to the global function
dictionary instead of the local variables when converting Maxima output
back to Sage expressions.
{{{
sage: dirac_delta(x)
dirac_delta(x)
sage: maxima(dirac_delta(x))
delta(x)
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7661>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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