## Mathematicians Of The Day

### 5th January

On this day in 1874, in a letter to Dedekind, Cantor asked if the points in a square can be put in one-to-one correspondence with those on a line.

See THIS LINK.

On this day in 2022 Google released a Garavito doodle.

Methinks that answering this question would be no easy job, despite the fact that the answer seems so clearly to be 'no' that proof appears almost unnecessary.It would be three years before Cantor could prove the answer was "yes."

See THIS LINK.

On this day in 2022 Google released a Garavito doodle.

Click on Ⓟ for a poster.

##### Born:

- 1723: Nicole-Reine Etable de Labrière Ⓟ
- 1838: Camille Jordan Ⓟ
- 1865: Julio Garavito Ⓟ
- 1868: Alice Bache Gould Ⓟ
- 1871: Federigo Enriques Ⓟ
- 1871: Gino Fano Ⓟ
- 1884: Arnaud Denjoy Ⓟ
- 1909: Stephen C Kleene Ⓟ
- 1917: Luna Isaac Mishoe Ⓟ
- 1942: Alexandru Lupas Ⓟ
- 1952: Lai-Sang Young Ⓟ

##### Died:

- 1951: Joseph Ritt Ⓟ
- 1961: Marília Peixoto Ⓟ
- 1970: Max Born Ⓟ
- 1978: Henry Jack Ⓟ
- 1987: Josif Zakharovich Shtokalo Ⓟ
- 1993: Hanno Rund Ⓟ
- 1994: David Bates Ⓟ
- 2013: Marie-Hélène Schwartz Ⓟ
- 2024: Bernard Malgrange Ⓟ

#### Quotation of the day

##### From Max Born

The difficulty involved in the proper and adequate means of describing changes in continuous deformable bodies is the method of differential equations. ... They express mathematically the physical concept of contiguous action.