Ever look closely at the printout from a computer or the images on the screens in a video arcade? Can you see the pattern of squares? (If you have a computer, try printing out the same word in small ...
Taiwanese Journal of Mathematics, Vol. 10, No. 4 (June 2006), pp. 1015-1023 (9 pages) Let G be an outerplanar graph with maximum degree Δ(G) ≥ 3. We prove that the chromatic number χ(G²) of the square ...
If you have trouble sticking to a goal, visual cues can help. For example, personal finance writer Trent Hamm suggests using graph paper to mark your progress. Visual cues or triggers work because ...
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