Hi Nathann,
Thank you very much. With your help I was able to compile the library from
the "new" sources and it is working properly now, although just for me of
course. I understand your disappointment because of not being able to solve
the issue for everybody.
I am willing to write to the aut
Dear Nathann,
I have just installed sage 6.6 and found out that the bug is still there
and that I am not able to apply the same workaround as before. I used to
replace dm.c and random.c, apply touch to modular_decomposition.pyx and do
sage -b. That used to be enough. But I do not know how to re
Hello Nathann,
Oh. Well, perhaps you need to do something like "touch
> modular_decomposition.pyx" when you are in the
> sage/graphs/modular_decomposition folder. Then run "sage -b".
> modular_decomposition.pyx is the actual Sage code, that depends on the .c
> file you modified. It should be e
our instance
> (translated from french) :
> Final Tree:
> Prime
> +--3
> +--1
> +--5
> +--2
> +--4
>
> Well.. It just means that I have to forward the bug you found to the
> software's author :-)
>
> I just create a trac ticket about that :
>
Hi,
I think I have found a serious bug on Graph.modular_decomposition. Clearly, a
graph is prime if and only if its complement is so. Nevertheless:
sage: P = Graph('Dl_')
sage: P.is_prime()
True
sage: P.complement().is_prime()
False
This behaviour seems to derive from Graph.modular_decompositio
