#10445: A Polyhedron should have a "is_simplicial" method.
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Reporter: jplabbe | Owner: mhampton
Type: enhancement | Status: new
Priority: minor | Milestone: sage-4.6.1
Component: geometry | Keywords: simplicial, polytope
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by mhampton):
Oops, sorry, went a little too fast there. Here's one that might actually
work:
{{{
def is_simplicial(pq):
"""
Tests if a polytope is simplicial, i.e. every facet is a simplex.
EXAMPLES::
sage: p = Polyhedron([[0,0,0],[1,0,0],[0,1,0],[0,0,1]])
sage: p.is_simplicial()
True
sage: p2 = Polyhedron([[1, 1, 1], [-1, 1, 1], [1, -1, 1], [-1, -1,
1], [1, 1, -1]])
sage: p2.is_simplicial()
False
"""
for f in pq.facial_incidences():
if len(f[1]) != pq.dim():
return False
return True
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10445#comment:4>
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