Keywords: Aperiodic-graph.svg An aperiodic graph The cycles in this graph have lengths 5 6 and 9; therefore there is no k > 1 that divides all cycle lengths en wikipedia 2006-10-16 David Eppstein wikipedia en David Eppstein original upload log page en wikipedia Aperiodic-graph png 2006-10-16 00 43 David Eppstein 180×288×8 4355 bytes <nowiki>An aperiodic graph The cycles in this graph have lengths 5 6 and 9; therefore there is no k > 1 that divides all cycle lengths </nowiki> Directed planar graphs Files by User David Eppstein from en wikipedia |