#14666: Test if a weight function is generic for a given matroid
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Reporter: Stefan | Owner: Stefanf
Type: enhancement | Status: needs_review
Priority: minor | Milestone: sage-7.2
Component: matroid theory | Resolution:
Keywords: matroid, weight | Merged in:
function | Reviewers:
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | c75ee707326fc1cc1beb0e265359c0f93cb84ac2
public/ticket/14666 | Stopgaps:
Dependencies: |
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Comment (by tara):
Replying to [comment:34 darij]:
> Nice, this looks a lot better. But I still struggle to find a mental
model for `smres`. From your description of the algorithm, it should be
the list containing all elements of `res` having higher weight than `e`,
and `e` itself. But from the code, it seems to be the list containing all
elements of `res` having higher weight than `e`, and the first element of
`res` that has the same weight as `e` (because `e` does not get appended
to `smres` unless `e` sets a negative weight record). Am I reading the
code right, and is this an actual issue? Thank you!
You're correct, there was a problem with `smres`. I wasn't adding `e` to
it all the time. I had moved some things about to make it read nicer, and
introduced that bug.
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Ticket URL: <http://trac.sagemath.org/ticket/14666#comment:35>
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