I used different vivid colors as "Four color theorem" for each 2d shape, which is not following the grid, to emphasize the presence.
我用称之为“四色定理”的四种不同的生动颜色，定义每个二维形状，以强调存在，而没有遵循网格结构。
Although there have been some new developments in mathematics, such as the proof of the famous four-color theorem, 1 the basic material has remained unchanged.
虽然在数学领域也有一些新的进展，例如对著名的四色定理的证明，1但是基本的材料却保持不变。
Did he do a handstand, solve the four-color map theorem?
他会倒立，解决这个四色地图原理？
This article discussed the origin of the colour problem and its true answer and argue the theorem of four color to set.
论述四色的由来及确切答案，并且证明了四色定理的成立。
This article discussed the origin of the colour problem and its true answer and argue the theorem of four color to set.
论述四色的由来及确切答案，并且证明了四色定理的成立。
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