## Mathematicians Of The Day

### 20th June

On this day in 1877, Georg Cantor wrote to to Dedekind, announcing a proof that the points inside a square are in one-to-one correspondence with those on a line segment. Three years earlier, Cantor had intimated that this was clearly impossible.

See THIS LINK.

See THIS LINK.

Click on Ⓟ for a poster.

##### Born:

- 1775: Jacques Français
- 1838: Theodor Reye Ⓟ
- 1873: Alfred Loewy Ⓟ
- 1880: George Carse Ⓟ
- 1885: F F P Bisacre
- 1907: John Womersley Ⓟ
- 1917: Helena Rasiowa Ⓟ
- 1942: Neil Trudinger Ⓟ
- 1946: Nigel Kalton Ⓟ

##### Died:

- 1800: Abraham Kästner Ⓟ
- 1863: Vincenzo Flauti
- 1963: Raphaël Salem Ⓟ
- 1966: Georges Lemaître Ⓟ
- 1990: Kosaku Yosida Ⓟ
- 2012: William Wager Cooper Ⓟ

#### Quotation of the day

##### From Georges Lemaître

Scientific progress is the discovery of a more and more comprehensive simplicity ... The previous successes give us confidence in the future of science: we become more and more conscious of the fact that the universe is cognizable.