Hello,

You don't mention reference in this problem, though it is said that some work has been made. Would it be possible to know how the projective plane has been shown to verify this conjecture ?

Thanks in advance for any piece of information.

Laurent Beaudou

## Drawing disconnected graphs on surfaces : any reference ?

Hello,

You don't mention reference in this problem, though it is said that some work has been made. Would it be possible to know how the projective plane has been shown to verify this conjecture ?

Thanks in advance for any piece of information.

Laurent Beaudou