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#1 2010-09-23 03:18:12
- shezleng
- Guest
counting triangles
there are N points on a paper. any three of points are not colinear.
you draw lines from each point to all other points.lines can be drawn with three colors; red,yellow or blue.
there will be obtained some triangles having colored edges.
purpose is not to get a triangle, edges of which are drawn with the same color.
what can be the value N at maximum?
#2 2010-09-23 14:40:27
- George,Y
- Member
- Registered: 2006-03-12
- Posts: 1,379
Re: counting triangles
It is really a hard question on maps. Better get the answer sheet.
X'(y-Xβ)=0
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