#11453: residue function for laurent series ring elements
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Reporter: tdupu | Owner:
AlexGhitza
Type: enhancement | Status:
needs_work
Priority: trivial | Milestone:
sage-5.3
Component: algebra | Resolution:
Keywords: laurent series, ring, residue, beginner | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Taylor Dupuy | Merged in:
Dependencies: | Stopgaps:
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Changes (by chapoton):
* status: needs_review => needs_work
Comment:
* The description is not very clear:
{{{
Return the residue of self.
The residue of a Laurent series in `t` is the coefficient of `1/t`.
}}}
would be more clear
* Please consider instead the shorter code suggested in comment 2 above.
* The example is not good.
Indeed an_element may at some point change and return something else.
It would be better to test on an explicit Laurent series, such as
{{{
1/t**2+2/t+3+4*t
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11453#comment:6>
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