MacTutor
Mathematicians Of The Day
27th January
On this day in 1853, De Morgan wrote to Hamilton about the earliest work on the Complex plane
As to Buée, I agree with Peacock that Buée had no completely formed double algebra, and yet he was the first formal maintainer of the geometrical interpretation of √-1.The postage stamp of one of today's mathematicians at THIS LINK was issued in 2001.
Click on Ⓟ for a poster.
Born:
- 1772: Robert Haldane Ⓟ
- 1832: Charles Lutwidge Dodgson Ⓟ
- 1885: Franciszek Leja Ⓟ
- 1889: Balthasar van der Pol Ⓟ
- 1895: Karl Reinhardt Ⓟ
- 1903: Howard Percy Robertson Ⓟ
- 1918: Félix Recillas Ⓟ
- 1931: Igor Kluvánek Ⓟ
- 1941: Beatrice Tinsley Ⓟ
Died:
- 1667: Gregory of Saint-Vincent Ⓟ
- 1823: Charles Hutton Ⓟ
- 1860: János Bolyai Ⓟ
- 1895: James Cockle Ⓟ
- 1927: Henry Heaton Ⓟ
- 1947: Alexander Brown
- 1965: Philip Franklin Ⓟ
- 1969: Balfour Lockhart Ⓟ
- 1972: Richard Courant Ⓟ
- 1973: Alan Broadbent Ⓟ
- 1995: Raphael Robinson Ⓟ
- 2001: Robert Rankin Ⓟ
Quotation of the day
From Charles Lutwidge Dodgson
"For a complete logical argument", Arthur began with admirable solemnity, "we need two prim Misses --"
"Of course!" she interrupted. "I remember that word now. And they produce --"
"A Delusion," said Arthur.
"Ye-es?" she said dubiously. "I don't seem to remember that so well. But what is the whole argument called?"
"A Sillygism."
