## Mathematicians Of The Day

### 27th June

On this day in 1908, the Göttingen Academy of Sciences announced a prize of one hundred thousand marks, from the will of Paul Wolfskehl, for a proof of Fermat's last theorem. Thousands of attempts at a proof were submitted. The prize would have been worth about a million pounds in today's money, but when Andrew Wiles collected the prize in 1997 it was about 75 000 DM.

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##### Born:

- 1767: Alexis Bouvard Ⓟ
- 1806: Augustus De Morgan Ⓟ
- 1826: Morgan Crofton Ⓟ
- 1834: Erastus De Forest Ⓟ
- 1850: Jorgen Gram Ⓟ
- 1853: John Kerr
- 1864: Charles Joly Ⓟ
- 1868: Charles Tweedie
- 1899: Lois Griffiths Ⓟ
- 1915: Aleksandr Yakovlevich Povzner Ⓟ
- 1940: Daniel Quillen Ⓟ

##### Died:

- 1831: Sophie Germain Ⓟ
- 1880: Carl Borchardt Ⓟ
- 1883: William Spottiswoode Ⓟ
- 1952: Max Dehn Ⓟ
- 1975: Geoffrey Taylor Ⓟ
- 1982: Tadija Pejovic Ⓟ
- 1989: Newby Curle Ⓟ
- 2023: Evelyn Boyd Granville Ⓟ

#### Quotation of the day

##### From Augustus De Morgan

The imaginary expression √(-a) and the negative expression -b, have this resemblance, that either of them occurring as the solution of a problem indicates some inconsistency or absurdity. As far as real meaning is concerned, both are imaginary, since 0 -ais as inconceivable as √(-a).

Said in 1831