#13191: Construct a 2-d fan from rays only
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Reporter: vbraun | Owner: AlexGhitza
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.2
Component: algebraic geometry | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Volker Braun | Merged in:
Dependencies: | Stopgaps:
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Changes (by vbraun):
* cc: novoselt (added)
* status: new => needs_review
Old description:
> It would be convenient to construct a 2-d fan just from rays (by creating
> the maximal number of 2-d cones). This is what this patch does.
New description:
It would be convenient to construct a 2-d fan just from rays (by creating
the maximal number of 2-d cones). This is what this patch does.
{{{
sage: fan = Fan2d([(1,1), (-1,-1), (1,-1), (-1,1)])
sage: [ cone.ambient_ray_indices() for cone in fan ]
[(2, 1), (1, 3), (3, 0), (0, 2)]
sage: fan.is_complete()
True
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13191#comment:1>
Sage <http://www.sagemath.org>
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