#8987: Add support for rational polyhedral fans
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Reporter: novoselt | Owner: mhampton
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.4.4
Component: geometry | Keywords:
Author: Andrey Novoseltsev | Upstream: N/A
Reviewer: Volker Braun | Merged:
Work_issues: |
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Comment(by vbraun):
Replying to [comment:11 novoselt]:
> {{{
> sage: fan(1)[i]
> }}}
> will do exactly this, but it will not since `fan(1)` purposefully
returns the list of rays, rather than one-dimensional cones... Did you
notice this convention? What do you think of it?
I've played a bit more with it and I don't understand your comment:
{{{
sage: fan = Fan(cones=[(0,1), (1,2)], rays=[(1,0), (0,1), (-1,0),
(-1,-1)])
sage: fan(1)
(1-dimensional cone, 1-dimensional cone, 1-dimensional cone)
sage: fan(2)
(2-dimensional cone, 2-dimensional cone)
sage: type( fan(1)[0] )
<class 'sage.geometry.fan.Cone_of_fan'>
sage: type( fan(2)[0] )
<class 'sage.geometry.fan.Cone_of_fan'>
}}}
So `fan(1)` definitely returns the one-cones in the current incarnation...
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8987#comment:14>
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