## Mathematicians Of The Day

### 5th August

On this day in 1900, the engineer Frank Baldwin was awarded a U.S. Patent for his mechanical calculator. This machine was capable of doing a calculation such as $54679285 \times 3298 = 180332281930$ in about 20 seconds with eight turns of the handle.

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The postage stamp of one of today's mathematicians at THIS LINK was issued in 1929.

See THIS LINK

The postage stamp of one of today's mathematicians at THIS LINK was issued in 1929.

Click on Ⓟ for a poster.

##### Born:

- 1802: Niels Abel Ⓟ
- 1855: Alfredo Capelli Ⓟ
- 1878: Louis Karpinski Ⓟ
- 1889: Hans Hamburger Ⓟ
- 1936: Ki Hang Kim Ⓟ

##### Died:

- 1853: Théodore Olivier Ⓟ
- 1872: Charles Eugène Delaunay Ⓟ
- 1910: Julius Petersen Ⓟ
- 1981: Jerzy Neyman Ⓟ

#### Quotation of the day

##### From Niels Abel

With the exception of the geometric series, there does not exist in all of mathematics a single infinite series whose sum has been determined rigorously.