Re: [sage-devel] Error concerning the function "is_prime"

2017-01-31 Thread Dima Pasechnik
The package in question is downgraded to an experimental one. A robust and efficient replacement, implementing modular decomposition of graphs (and digraphs), for the corresponding functionality would be great. Perhaps this should be made a GSoC project? On Tuesday, January 31, 2017 at

Re: [sage-devel] Error concerning the function "is_prime"

2017-01-31 Thread kcrisman
> > >> > I have an algorithm giving the list of all prime graphs on at most 8 >> > vertices. >> >> >> Great, go ahead, ask for a trac account, and propose your changes. >> > > I've reported this at https://trac.sagemath.org/ticket/22281 > Note it depends on an optional package, so this may

Re: [sage-devel] Error concerning the function "is_prime"

2017-01-31 Thread kcrisman
On Monday, January 30, 2017 at 9:48:22 AM UTC-5, Thierry (sage-googlesucks@xxx) wrote: > > Hi, > > On Mon, Jan 30, 2017 at 03:44:06AM -0800, jamel Dammak wrote: > > Dear sir, > > > > there is an error concerning the function "is_prime" for graphs in > > Sagemath, section Graph Theory. > >

Re: [sage-devel] Error concerning the function "is_prime"

2017-01-30 Thread Thierry
Hi, On Mon, Jan 30, 2017 at 03:44:06AM -0800, jamel Dammak wrote: > Dear sir, > > there is an error concerning the function "is_prime" for graphs in > Sagemath, section Graph Theory. > > Here is a conter-example. > > g1=Graph({0:[1,4],1:[0,2,4],2: [1,3,4],3:[2],4:[0,1,2]});g2=G >

[sage-devel] Error concerning the function "is_prime"

2017-01-30 Thread jamel Dammak
Dear sir, there is an error concerning the function "is_prime" for graphs in Sagemath, section Graph Theory. Here is a conter-example. g1=Graph({0:[1,4],1:[0,2,4],2: [1,3,4],3:[2],4:[0,1,2]});g2=G raph({0:[1],1:[0,2,4],2:[1,3,4 ],3:[2,4],4:[1,2,3]}) #g1.show();g2.show(); #[1,4] is a