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.
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.]