Dear all,
2011/8/16 饶广 <general...@hotmail.com>:
>
> Dear forum,
>
> I am new in GAP. Maybe this is just a very simple question.
>
> Cayley sum graph Cay^+(G,S) is a graph on an abelian group G and two vertices
> are adjacent iff their sum lies in S.
>
> I am trying to draw Cay^+(Z_2\timesZ_6,{(0,1),(1,2),(1,3)}) and do the
> following in GAP:
>
>>G:=AbelianGroup([2,6]);
>>gen:=GeneratorsOfGroup(G);
>>S:=[gen[2],gen[1]*gen[2]^2,gen[1],gen[1]*gen[2]^3];
>>Graph(Group(()),Elements(G),OnPoints, function(x,y) return x*y in S; end,
>>true);
>
> This returns an error. I guess the problem is how to refer the elements of a
> group to the vertex set.
you need to do
Graph(G,Elements(G),OnPoints, function(x,y) return x*y in S; end, true);
(assuming you did LoadPackage("grape");)
HTH,
Dmitrii
>
> In addition, I also want to test if this graph is hamiltonian or not. But I
> couldn't find a direct function for this. Does anyone know about this?
>
>
> Thanks very much,
> Grant
>
>
>
>
>
> _______________________________________________
> Forum mailing list
> Forum@mail.gap-system.org
> http://mail.gap-system.org/mailman/listinfo/forum
>
--
Dmitrii Pasechnik
-----
DISCLAIMER: Any text following this sentence does not constitute a
part of this message, and was added automatically during transmission.
CONFIDENTIALITY: This email is intended solely for the person(s) named and may
be confidential and/or privileged. If you are not the intended recipient,
please delete it, notify us and do not copy, use, or disclose its content.
Thank you.
Towards A Sustainable Earth: Print Only When Necessary
_______________________________________________
Forum mailing list
Forum@mail.gap-system.org
http://mail.gap-system.org/mailman/listinfo/forum
