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.
See THIS LINK.

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Quotation of the day

From Giuseppe Bruno
Truth does not change because it is, or is not, believed by a majority of the people.
Quoted in Des MacHale, Wisdom (London, 2002).