this is the complete graph k5

http://knowledgerush.com/wiki_image/f/f0/GraphK5.png

how can we prove that k5 is the onlysimple nonplanar graph wuth nodes or fewer?

how it could be drawen with less that 5 nodes(Wondering)

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- Sep 23rd 2009, 07:39 PMkoko2009the complete graph k5
this is the complete graph k5

http://knowledgerush.com/wiki_image/f/f0/GraphK5.png

how can we prove that k5 is the onlysimple nonplanar graph wuth nodes or fewer?

how it could be drawen with less that 5 nodes(Wondering) - Sep 26th 2009, 05:52 PMkoko2009
hi there

if i delete one edge of this graph that will give a smaller graph which planar so i think we could not find a smaller graph and nonplanar

please help me if that correct idea