摘要:
Bicoloring The four-color theoremstates that every planar map can be colored using only four colors in such a way that no region is colored using the same color as a neighbor. After being open for over 100 years, the theorem was proven in 1976 with the assistance of a computer.Here you are asked to 阅读全文
posted @ 2012-04-25 00:30
mtry
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