Pierre Frédéric Sarrus
French mathematician (1798–1861)
From Wikipedia, the free encyclopedia
Pierre Frédéric Sarrus (French pronunciation: [pjɛʁ fʁedeʁik saʁy]; 10 March 1798, Saint-Affrique – 20 November 1861) was a French mathematician.[1]
Pierre Frédéric Sarrus | |
|---|---|
| Born | 10 March 1798 |
| Died | 20 November 1861 (aged 63) |
| Occupation | Mathematician |
Sarrus was a professor at the University of Strasbourg, France (1826–1856) and a member of the French Academy of Sciences in Paris (1842).[2] He is the author of several treatises, including one on the solution of numeric equations with multiple unknowns (1842); one on multiple integrals and their integrability conditions; and one on the determination of the orbits of the comets.
Sarrus discovered a mnemonic rule for solving the determinant of a 3-by-3 matrix, named rule of Sarrus. He also demonstrated the fundamental lemma[which?] of the calculus of variations. Additionally, he also developed the Sarrus linkage, the first linkage capable of transforming rotary motion into perfect straight-line motion, and vice versa. Sarrus numbers (Fermat pseudoprimes to base 2) are also named after Sarrus, who discovered the first number (341).
