#17553: substitute_function() can leave limits unevaluated
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Reporter: wonder | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: symbolics | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Here is an example:
{{{
┌────────────────────────────────────────────────────────────────────┐
│ Sage Version 6.4.1, Release Date: 2014-11-23 │
│ Type "notebook()" for the browser-based notebook interface. │
│ Type "help()" for help. │
└────────────────────────────────────────────────────────────────────┘
sage: l = limit( function('f')(x), x=1 )
sage: l
limit(f(x), x, 1)
sage: ls = l.substitute_function( function('f'), (1+x).function(x) )
sage: ls
limit(x + 1, x, 1)
sage: simplify(ls)
limit(x + 1, x, 1)
sage: maxima(repr(ls))
2
}}}
This is a simplified case of a situation that's been biting me in an
expression that's passed to odeint() after being computed: it breaks the
integration because it fails to evaluate to a float expression.
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Ticket URL: <http://trac.sagemath.org/ticket/17553>
Sage <http://www.sagemath.org>
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