MacTutor
Mathematicians Of The Day
9th April
On this day in 1673, Leibniz was elected a Fellow of the Royal Society of London: "a position of which he was very desirous" according to Oldenberg.
The postage stamp of one of today's mathematicians at THIS LINK was issued in 1962.
The postage stamp of one of today's mathematicians at THIS LINK was issued in 1962.
Click on Ⓟ for a poster.
Born:
- 1652: Jean Le Fèvre
- 1791: George Peacock Ⓟ
- 1813: Robert Anstice Ⓟ
- 1816: Charles Eugène Delaunay Ⓟ
- 1834: Edmond Laguerre Ⓟ
- 1863: Lászlo Rátz Ⓟ
- 1869: Élie Cartan Ⓟ
- 1878: Marcel Grossmann Ⓟ
- 1894: Alfred Brauer Ⓟ
- 1894: Cecilia Krieger Ⓟ
- 1900: Hendrik Kloosterman Ⓟ
- 1919: J Presper Eckert Ⓟ
- 1931: Heisuke Hironaka Ⓟ
Died:
- 1348: William of Ockham Ⓟ
- 1643: Benedetto Castelli Ⓟ
- 1920: Moritz Cantor Ⓟ
- 1951: Vilhelm Bjerknes Ⓟ
- 1953: Hans Reichenbach Ⓟ
- 1971: Adolphe Rome Ⓟ
- 1972: George Forsythe Ⓟ
- 1982: Maximilian Herzberger Ⓟ
- 1983: Yozo Matsushima Ⓟ
- 1989: Udita Narayana Singh Ⓟ
- 2001: Ray Vanstone Ⓟ
- 2002: Leopold Vietoris Ⓟ
Quotation of the day
From William of Ockham
. . . the contradictory opposite of a copulative proposition is a disjunctive proposition composed of the contradictory opposites of its parts.
. . . the contradictory opposite of a disjunctive proposition is a copulative proposition composed of the contradictories of the parts of the disjunctive proposition.
Summa totius logicae (transl. P Boehner 1955)
[Note: This is Ockham's formulation of De Morgan's Laws.]
