Help! Trigonometry, Graph and Number Theories

[Paulo Sachs]

For a picture exemplifing a(3)=4 see
http://img144.imageshack.us/img144/159/1237oa.gif
node(1) is green, node(2) is yellow, node(3) is blue
The sum curve is white.
Those are the 4 colors of my country’s flag.
Black dots represent the edges. Cases 1, 2 and 4 have
2 edges. In the 3rd case the 3 edges are superposed in picture.




	
		
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