MacTutor
Mathematicians Of The Day
21st June
On this day in 1976, Kenneth 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.
See THIS LINK.
Click on Ⓟ for a poster.
Born:
- 1781: Siméon-Denis Poisson Ⓟ
- 1802: Jean-Baptiste Brasseur Ⓟ
- 1828: Giuseppe Bruno
- 1868: James Macdonald
- 1872: Onorato Nicoletti Ⓟ
- 1894: Harry Schmidt Ⓟ
- 1918: Tibor Szele Ⓟ
- 1928: Chukwuka Okonjo Ⓟ
- 1954: Pavel Krejčí Ⓟ
- 1964: Haim Nessyahu Ⓟ
Died:
- 1820: Alexis Petit Ⓟ
- 1824: Nicola Fergola Ⓟ
- 1913: Gaston Tarry Ⓟ
- 1929: Ferdinand Rudio Ⓟ
- 1940: Wolfgang Doeblin Ⓟ
- 1947: Nikolai Sergeevitch Krylov Ⓟ
- 1948: D'Arcy Thompson Ⓟ
- 1957: Maurice Audin Ⓟ
- 1999: Edwin Hewitt Ⓟ
- 2007: Jack Todd Ⓟ
- 2017: Jean-Pierre Kahane Ⓟ
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.
