MacTutor
Mathematicians Of The Day
30th June
On this day in 1742, Leonard Euler claimed in a letter to Goldbach that prime numbers of the form 4n+ 1 are represented uniquely as a sum of two squares.
He also mentioned that 641 divides , thereby disproving Fermat's claim that all the so-called numbers Fermat numbers are prime. Years later we have not found another with n > 4 which is prime.
He also mentioned that 641 divides , thereby disproving Fermat's claim that all the so-called numbers Fermat numbers are prime. Years later we have not found another with n > 4 which is prime.
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Born:
- 1748: Dominique Cassini Ⓟ
- 1791: Félix Savart Ⓟ
- 1846: Eugen Netto Ⓟ
- 1856: Cargill Knott Ⓟ
- 1868: Geoffrey Bennett Ⓟ
- 1876: Anton Davidoglu Ⓟ
- 1880: Rudolf Fueter Ⓟ
- 1900: Gheorghe Vrănceanu Ⓟ
- 1907: Dmitrii Konstantinovich Faddeev Ⓟ
- 1923: Murray Macbeath Ⓟ
- 1958: Abigail Thompson Ⓟ
Died:
- 1817: Li Rui
- 1919: John William Strutt Ⓟ
- 1960: Albert Châtelet Ⓟ
- 1972: Yuri Vladimirovich Linnik Ⓟ
- 2002: Claude Berge Ⓟ
- 2019: Mitchell Feigenbaum Ⓟ
Quotation of the day
From John William Strutt
Examples ... which might be multiplied ad libitum, show how difficult it often is for an experimenter to interpret his results without the aid of mathematics.
