Re: [sage-combinat-devel] Re: a problem with cartesian product of directed graphs ?

[Frédéric Chapoton]

Le mercredi 28 mars 2012 23:14:33 UTC+2, Nicolas M. Thiery a écrit :
>
> On Wed, Mar 28, 2012 at 05:03:37AM -0700, Fr�d�ric Chapoton wrote:
> >If somebody can cross-post to sage-devel, it would be great, yes.
>
> Done.
>
> >Should I create another ticket for products of posets ?
>
> Please!
>
This is now ticket #12831. I will make a patch with a working procedure.

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Re: [sage-combinat-devel] Re: a problem with cartesian product of directed graphs ?

[Nicolas M. Thiery]

On Wed, Mar 28, 2012 at 05:03:37AM -0700, Frédéric Chapoton wrote:
>If somebody can cross-post to sage-devel, it would be great, yes.

Done.

>Should I create another ticket for products of posets ?

Please!
Nicolas
--
Nicolas M. Thiéry "Isil" 
http://Nicolas.Thiery.name/

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[sage-combinat-devel] Re: a problem with cartesian product of directed graphs ?

[Frédéric Chapoton]

This is now 

Ticket #12770  


 If somebody can cross-post to sage-devel, it would be great, yes.
 
Should I create another ticket for products of posets ?

Frederic
 

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[sage-combinat-devel] Re: a problem with cartesian product of directed graphs ?

[Keshav Kini]

Frédéric Chapoton 
writes:
> I have found the following wrong behaviour on sage 4.8, without sage-combinat
>
> sage: P=DiGraph([[0,1]])  
> sage: Q=P.cartesian_product(P)
> sage: len(Q.edges()) 
> 0
>
> The result is a disconnected union of 4 points.
> This should be a directed square, with 4 edges.
>
> Maybe this is not the right place to ask.. Or maybe this has been corrected in
> 5.0 beta* ?

I can confirm that it still produces the same result on 5.0.beta10. BTW
I think this could equally correctly have been posted in sage-devel if
you so desired. It would certainly reach a wider audience there.

-Keshav


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