On Mon, 29 Jun 2020, 18:59 Dima Pasechnik, wrote:
> On Mon, Jun 29, 2020 at 6:25 PM David Joyner wrote:
> >
> > Hi:
> >
> > In SageMath version 9.1.beta3, I get
> >
> > sage: Gamma1 = graphs.CirculantGraph(10,[2,4])
> >
> > sage: Gamma1.is_connected()
> >
> > False
> >
> >
> > My understanding is that all circulant graphs are connected.
>
> no, why? e.g. graphs.CirculantGraph(4,[2])
> is the disjoint union of two K_2.
>
PS. In case, I am a parttime graph theorist. :-) and no, it is not a bug.
>
> Dima
> >
> > Is this a bug?
> >
> > - David
> >
> >
> >
> >
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