Mathematicians Of The Day

21st June

On this day in 1976Kenneth Appel and Wolfgang Haken announced that they had proved the four colour conjecture with the aid of a computer. No simple proof is known as yet.

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Quotation of the day

From D'Arcy Thompson
The harmony of the world is made manifest in Form and Number, and the heart and soul and all the poetry of Natural Philosophy are embodied in the concept of mathematical beauty.