## Mathematicians Of The Day

### 17th June

On this day in 1870, Benjamin Peirce sent a letter of introduction for his son to August De Morgan,

I presume upon the unseen brotherhood of science to introduce to you my son Charles S Peirce Esq. who is a devoted student of Logic and I think that he has original thoughts which you may regard as deserving your consideration. He carries with him a memoir which he has written upon one of the subjects of your own learned investigations ...The postage stamp designed by one of one of today's mathematicians at THIS LINK was issued in 1949.

Click on Ⓟ for a poster.

##### Born:

- 1714: César-François Cassini de Thury Ⓟ
- 1898: Maurits Escher Ⓟ
- 1903: William Hodge Ⓟ
- 1906: Tom Cowling Ⓟ
- 1906: Samuel Wilks Ⓟ
- 1928: Iain Adamson Ⓟ
- 1939: Carlo Cercignani Ⓟ
- 1947: Wolfgang Alt Ⓟ

##### Died:

- 1918: Johann Heinrich Graf Ⓟ
- 1956: David Picken Ⓟ
- 1994: Frank Yates Ⓟ
- 2012: Nathan Divinsky Ⓟ

#### Quotation of the day

##### From Maurits Escher

I came to the . . . open gate of mathematics. From here, well-trodden paths lead in every direction, and since then I have often spent time there. Sometimes I think . . . I have trodden all the paths . . . and then I suddenly discover a new path and experience fresh delights.