#11694: Unlabelled edges are doubled when creating multiedge graph
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Reporter: iandrus | Owner: iandrus
Type: defect | Status: closed
Priority: major | Milestone: sage-duplicate/invalid/wontfix
Component: graph theory | Resolution: duplicate
Keywords: | Work_issues:
Upstream: N/A | Reviewer: Ivan Andrus, Nathann Cohen
Author: | Merged:
Dependencies: |
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Changes (by jdemeyer):
* status: positive_review => closed
* resolution: => duplicate
Old description:
> When creating a graph from a list of edges, if the edges are not labelled
> they get doubled when multiedges are allowed. It works fine if they are
> labelled.
>
> {{{
> sage: g=Graph([[1,2],[1,2,],[2,3]])
> sage: g.num_edges()
> 6
> sage: g=Graph([[1,2,'a'],[1,2,'b'],[2,3,'c']])
> sage: g.num_edges()
> 3
> }}}
New description:
When creating a graph from a list of edges, if the edges are not labelled
they get doubled when multiedges are allowed. It works fine if they are
labelled.
{{{
sage: g=Graph([[1,2],[1,2,],[2,3]])
sage: g.num_edges()
6
sage: g=Graph([[1,2,'a'],[1,2,'b'],[2,3,'c']])
sage: g.num_edges()
3
}}}
See #11693.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11694#comment:8>
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