#11202: Add inverse method to symbolic expressions
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Reporter: ltw | Owner: tba
Type: enhancement | Status:
needs_review
Priority: minor | Milestone: sage-5.3
Component: symbolics | Resolution:
Keywords: InverseFunction, inverse function | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Eviatar Bach | Merged in:
Dependencies: | Stopgaps:
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Comment (by tkluck):
I've taken a look at your patch (haven't tried it yet). It looks like good
work! Here's some feedback:
{{{
if not with_respect_to:
raise TypeError('You must specify with respect to which \
variable to take the inverse.')
}}}
I would test for
{{{
if with_respect_to == None or not with_respect_to.is_symbol():
}}}
I also think that a `ValueError` is more appropriate than a `TypeError`.
Also, it would be a nice enhancement if something like this would work:
{{{
sage: f(x) = log(x)
sage: f
x |--> log(x)
sage: inverse(f)
x |--> exp(x)
}}}
(or does it?)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11202#comment:10>
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