## 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.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1994.

See THIS LINK.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1994.

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 Ⓟ
- 1946: David Kazhdan Ⓟ

##### 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.