***** To join INSNA, visit http://www.insna.org ***** Dear all, Did anyone notice that the network printed on the T-shirt for the Barcelona EUSN conference, is actually a planar graph? So it could have been drawn in a way such that no link cross each other. There is even such a layout in which a line can separate yellow and blue nodes. Thanks to Miranda Jessica Lubbers and JosÚ Luis Molina, and all the organizing committee, for a very nice conference. _ Christophe Prieur, [log in to unmask] Liafa, UniversitÚ Paris-Diderot http://liafa.fr/~prieur/ _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.