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.
A (personally designed) stamp of one of today's mathematicians is at THIS LINK.
See THIS LINK.
A (personally designed) stamp of one of today's mathematicians is at 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 Ferdinand Rudio
The whole form of mathematical thinking was created by Euler. It is only with the greatest of difficulty that one is able to follow the writings of any author preceding Euler, because it was not yet known how to let the formulas speak for themselves. This art Euler was the first to teach.
