## Mathematicians Of The Day

### 10th June

On this day in 1854, Bernhard Riemann gave his habilitation lecture

On this day in 2015 Google released an Abul-Wafa doodle.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1936.

*Über die Hypothesen welche der Geometrie zu Grunde liegen*[On the hypotheses at the foundations of geometry], in which he defined what are now called Riemannian manifolds.On this day in 2015 Google released an Abul-Wafa doodle.

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1936.

Click on Ⓟ for a poster.

##### Born:

- 940: Abu'l-Wafa Ⓟ
- 1625: János Apáczai Ⓟ
- 1816: Johann Rosenhain Ⓟ
- 1861: Pierre Duhem Ⓟ
- 1885: Andreas Speiser Ⓟ
- 1887: Vladimir Smirnov Ⓟ
- 1904: John Semple Ⓟ
- 1924: Norrie Everitt Ⓟ
- 1932: Pierre Cartier Ⓟ

##### Died:

- 1836: André-Marie Ampère Ⓟ
- 1875: Victor Amédée Lebesgue
- 1903: Luigi Cremona Ⓟ
- 1948: Philippa Fawcett Ⓟ
- 1972: Sylvia Skan
- 1974: Jaroslav Hájek Ⓟ
- 1992: Morris Kline Ⓟ
- 2007: Hans-Jürgen Hoehnke Ⓟ
- 2012: George Saitoti Ⓟ

#### Quotation of the day

##### From André-Marie Ampère

There is synthesis when, in combining therein judgments that are made known to us from simpler relations, one deduces judgments from them relative to more complicated relations.

There is analysis when from a complicated truth one deduces more simple truths.