## Mathematicians Of The Day

### 8th June

On this day in 1637, the printing of René Descartes'

*Discours de la Méthode*was completed, including its important appendix on Geometry in which he introduced the Cartesian coordinate system.
Click on Ⓟ for a poster.

##### Born:

- 1625: Giovanni Cassini Ⓟ
- 1745: Caspar Wessel Ⓟ
- 1858: Charlotte Angas Scott Ⓟ
- 1860: Alicia Boole Stott Ⓟ
- 1870: Peter Pinkerton Ⓟ
- 1896: Eleanor Pairman Ⓟ
- 1903: Evan James Williams Ⓟ
- 1905: Hubert Linfoot Ⓟ
- 1915: José Luis Massera Ⓟ
- 1923: Gloria Olive Ⓟ
- 1924: Samuel Karlin Ⓟ
- 1925: Guri Ivanovich Marchuk Ⓟ

##### Died:

- 1882: John Scott Russell Ⓟ
- 1893: Joel E Hendricks Ⓟ
- 1935: Alexander von Brill Ⓟ
- 1943: Mihailo Petrović Ⓟ
- 1948: Giacomo Albanese Ⓟ
- 1966: Paddy Kennedy Ⓟ
- 1988: Roger Lyndon Ⓟ

#### Quotation of the day

##### From Giovanni Cassini

Light takes some time to come from the satellite to us; and it takes approximately ten or eleven minutes to traverse a distance equal to the semi-diameter of the Earth's orbit.