#15733: substitution in symbolic function fails with latex_name
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Reporter: dkrenn | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.1
Component: symbolics | Keywords: substitute, function, solve,
Merged in: | latex_name
Reviewers: | Authors:
Work issues: | Report Upstream: N/A
Commit: | Branch:
Stopgaps: | Dependencies:
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The following substitution does not work:
{{{
sage: function('f', latex_name = 'blub')
f
sage: eq = solve((ln(f(x))==x).diff(x), f(x))[0]
sage: eq
f(x) == D[0](f)(x)
sage: eq.subs(f(x) == 42)
f(x) == D[0](f)(x)
}}}
Note that
{{{
sage: bool(eq.lhs() == f(x))
True
sage: id(eq.lhs()), id(f(x))
(119698064, 119698064)
}}}
When removing {{{latex_name}}}, everything works fine:
{{{
sage: function('f')
f
sage: eq = solve((ln(f(x))==x).diff(x), f(x))[0]
sage: eq.subs(f(x) == 42)
42 == D[0](f)(x)
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15733>
Sage <http://www.sagemath.org>
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