Crossing number (graph theory): Revision history

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8 December 2014

  • curprev 13:0713:07, 8 December 2014en>Gilo1969 21,409 bytes +1,540 fix citation(s) with wikilink(s) embedded in URL title

28 December 2013

26 July 2012

  • curprev 22:1622:16, 26 July 2012en>David Eppstein 17,274 bytes +17,274 →‎History: why Turán posed the problem; use vertical fractions for the Zarankiewicz formula