## Mathematicians Of The Day

### 27th July

On this day in 1837, Lejeune Dirichlet presented his first analytic number theory paper at a meeting of the Berlin Academy of Sciences. He proved the fundamental theorem that bears his name:

*Every arithmetical sequence an + b, n = 0, 1, 2, ... of integers, where a and b are relatively prime, contains infinitely many primes.*
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##### Born:

- 1667: Johann Bernoulli Ⓟ
- 1801: George Airy Ⓟ
- 1844: Ágoston Scholtz
- 1848: Lóránd Eötvös Ⓟ
- 1849: John Hopkinson Ⓟ
- 1867: Derrick Norman Lehmer Ⓟ
- 1871: Ernst Zermelo Ⓟ
- 1879: David Picken Ⓟ
- 1902: Reuben R McDaniel Ⓟ
- 1921: Jonas Kubilius Ⓟ
- 1930: Ismail Mohamed Ⓟ

##### Died:

- 1759: Pierre-Louis Moreau de Maupertuis Ⓟ
- 1870: Pierre-Joseph-Étienne Finck
- 1931: Jacques Herbrand Ⓟ
- 1987: Jan Mikusiński Ⓟ
- 1999: Aleksandr Aleksandrov Ⓟ
- 2015: J W S Cassels Ⓟ

#### Quotation of the day

##### From George Airy

In the hands of Science and indomitable energy, results the most gigantic and absorbing may be wrought out by skilful combinations of acknowledged data and the simplest means.