#20253: bug in strongly connected test for static digraphs
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Reporter: vdelecroix | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.2
Component: graph theory | Resolution:
Keywords: bug | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
There are other weird stuff
{{{
sage: G = Graph([(0,1)])
sage: G2 = G.copy(immutable=True)
sage: G2._backend.is_connected()
Traceback (most recent call last):
...
AttributeError: 'sage.graphs.base.static_sparse_backend.StaticSpars'
object has no attribute 'num_edges'
}}}
The thing is that it is not clear to me what attributes and methods should
be implemented in a new backend.
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Ticket URL: <http://trac.sagemath.org/ticket/20253#comment:3>
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