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/*
 * The transitive 6-net, also known as Heawood's graph,
 * can be used to test the "stability points" of the layout
 * algorithm.

 * The "ideal" layout occurs when len="2.5". The layout
 * loses the regularity when smaller values are used.
 */
graph "Heawood" {
	node [
		fontname = "Arial"
		label = "\N"
		shape = "circle"
		width = "0.50000"
		height = "0.500000"
		color = "black"
	]
	edge [
		color = "black"
	]
	/* The outer wheel */
	"0" -- "1" -- "2" -- "3" -- "4" -- "5" -- "6" -- "7" -- "8" -- "9" -- "10" -- "11" -- "12" -- "13" -- "0";
	/* The internal edges. The len = makes them internal */
	"0" -- "5" [len = 2.5];
	"2" -- "7" [len = 2.5];
	"4" -- "9" [len = 2.5];
	"6" -- "11" [len = 2.5];
	"8" -- "13" [len = 2.5];
	"10" -- "1" [len = 2.5];
	"12" -- "3" [len = 2.5];
}