## 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.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 2016.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 2016.

Click on Ⓟ for a poster.

##### 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