Virgil
Posts:
8,833
Registered:
1/6/11


Re: 4 colors problem
Posted:
Mar 5, 2014 8:04 PM


In article <dea5adba245b41928bb69af24f3bc611@googlegroups.com>, swtchwrds88@gmail.com wrote:
> All of this really leads one to conclude: > > "4 colors are not only sufficient but necessary for coloring a map of > countries > with no two adjacent countries sharing a same color."
Not at all! What about maps showing less than 4 countries?
And even maps with more than four counties can sometimes be done in no more than three colors. 

