Martin Gardner's April Fool's Map
Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
In a map coloring, adjacent regions have different colors. According to the four-color theorem, only four colors are needed to color any map. The map shown here was introduced for the first time by Martin Gardner in 1975 [1]. You can color it by clicking the polygons; clicking the same polygon repeatedly cycles through the colors.
Contributed by: Enrique Zeleny (August 2012)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Reference
[1] M. Gardner, "Mathematical Games: Six Sensational Discoveries That Somehow or Another Have Escaped Public Attention," Scientific American, 232(4), pp. 127–131, 1975.
Permanent Citation
"Martin Gardner's April Fool's Map"
http://demonstrations.wolfram.com/MartinGardnersAprilFoolsMap/
Wolfram Demonstrations Project
Published: August 15 2012