Hello Anne,
Yes, this is a bug! I have posted a fix at #10549.
On Thu, Mar 10, 2011 at 7:38 AM, Anne Schilling <a...@math.ucdavis.edu> wrote:
> Hi Robert,
>
> Thank you for your work on this!
>
> However, there is one more thing that would be very handy to have.
> Namely, if one specifies certify=True in the isomorphism check, the
> result is a bijection between the vertices of the graph:
>
> sage: D = digraphs.RandomDirectedGNP(6, .2)
> sage: D.is_isomorphic(D, certify = True)
> (True, {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5})
>
> If in addition one specifies edge_labels=True this changes to some
> labeling of an extended digraph(?):
>
> sage: D.is_isomorphic(D,edge_labels=True, certify = True)
> {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, 10: 10}
>
> Would it be possible to give as the output again the isomorphism of the
> vertices? That would be the most natural in the setting of crystal
> isomorphisms that I need. Or is there another easy way to obtain
> the vertex isomorphism from the current code?
>
> Best,
>
> Anne
>
>
> On 12/22/10 9:44 AM, Robert Miller wrote:
>>
>> On Dec 17, 6:38 pm, Anne Schilling<a...@math.ucdavis.edu> wrote:
>>>
>>> Thank you, very nice! However, playing around with this, also in the
>>> setting of crystals,
>>> I came across the following bug: ...
>>
>> Please see trac #10516.
>
--
Robert L. Miller
http://www.rlmiller.org/
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