## Mathematicians Of The Day

### 6th May

On this day in 1996, Volodymyr Petryshyn killed his wife Arcadia with a hammer. After making a mistake in a proof he feared that he would be ridiculed by his fellow mathematicians and while under the strain of this, he had a complete mental breakdown. He was found not guilty of murder by reason of insanity. He later published

*Development of mathematical sciences in the Ukraine*in Ukrainian in 2004.
Click on Ⓟ for a poster.

##### Born:

- 1769: Jean Nicolas Pierre Hachette Ⓟ
- 1792: Martin Ohm Ⓟ
- 1865: J A Third
- 1868: Mihailo Petrović Ⓟ
- 1872: Willem de Sitter Ⓟ
- 1895: Júlio Mello e Souza Ⓟ
- 1901: Nikolai Evgrafovich Kochin Ⓟ
- 1906: André Weil Ⓟ
- 1942: Thierry Aubin Ⓟ

##### Died:

- 1856: William Hamilton Ⓟ
- 1916: Ágoston Scholtz
- 1928: Robert Allardice Ⓟ
- 1951: Élie Cartan Ⓟ
- 1968: Hendrik Kloosterman Ⓟ
- 1983: Yudell Luke Ⓟ
- 2009: Chuan-Chih Hsiung Ⓟ

#### Quotation of the day

##### From André Weil

Rigour is to the mathematician what morality is to men.