#14564: BinaryTree().graph() falsely claims that the graph has 0 vertices
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Reporter: darij | Owner: tbd
Type: defect | Status: needs_info
Priority: minor | Milestone: sage-5.12
Component: combinatorics | Resolution:
Keywords: binary trees, trees | Merged in:
Authors: darij | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by chapoton):
There is now a similar problem with the new method `to_undirected_graph`
(since #14784):
{{{
sage: bt=BinaryTree()
sage: bt.to_undirected_graph()
Graph on 1 vertex
}}}
It should return the empty graph. The problem come from
{{{
sage: bt.as_ordered_tree()
o
}}}
which should raise an exception.
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Ticket URL: <http://trac.sagemath.org/ticket/14564#comment:12>
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