#14777: is_isomorphic fails on empty graph
------------------------------------------------+---------------------------
Reporter: ajroberts | Owner: jason,
ncohen, rlm
Type: defect | Status:
positive_review
Priority: major | Milestone: sage-5.11
Component: graph theory | Resolution:
Keywords: Graphs, Isomorphisms, days49 | Work issues:
Report Upstream: N/A | Reviewers: Travis
Scrimshaw, Frédéric Chapoton
Authors: Austin Roberts | Merged in:
Dependencies: | Stopgaps:
------------------------------------------------+---------------------------
Changes (by chapoton):
* status: needs_work => positive_review
* reviewer: Travis Scrimshaw => Travis Scrimshaw, Frédéric Chapoton
Old description:
> G=Graph()
> H=Graph()
>
> G.is_isomorphic(H) returns False
>
> It should return True.
>
> The same problem occurs in the Digraph case.
>
> ----
>
> Apply:
>
> * [attachment:is_isomorphic.patch]
New description:
G=Graph()
H=Graph()
G.is_isomorphic(H) returns False
It should return True.
The same problem occurs in the Digraph case.
----
Apply:
* [attachment:is_isomorphic.patch]
* [attachment:trac_14777_review.patch]
--
Comment:
Here is a review patch. Positive review.
for the bot
apply is_isomorphic.patch, trac_14777_review.patch
Frederic
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14777#comment:5>
Sage <http://www.sagemath.org>
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