#18624: Implement the lift theorem for linear matroids
-------------------------------------+-------------------------------------
Reporter: Rudi | Owner: Rudi
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.8
Component: matroid theory | Resolution:
Keywords: | Merged in:
Authors: Rudi Pendavingh | Reviewers: Michael Welsh
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/Rudi/implement_the_lift_theorem_for_linear_matroids|
53903306acb3e9569d354284b1e8cbf1a3117119
Dependencies: | Stopgaps:
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Comment (by Rudi):
Replying to [comment:45 yomcat]:
> Something isn't quite right:
>
> --> 496 raise ValueError("Input matrix has a cross ratio
"+str(cr)+", which is not in the lift_map")
> {{{
> sage: M.cross_ratios()
> {4, 5, 6, 14, 15, 16}
> }}}
>
Yes, it has 15 as a cross ratio. But 15 ''is'' in the lift map! I'll
figure it out.
--
Ticket URL: <http://trac.sagemath.org/ticket/18624#comment:46>
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