Jacques Philippe Marie Binet

Jacques Philippe Marie Binet (February 2, 1786 - May 12, 1856) was a French mathematician, physicist and astronomer born in Rennes; he died in Paris, France, in 1856. He made significant contributions to number theory, and the mathematical foundations of matrix algebra which would later lead to important contributions by Cayley and others. In his memoir on the theory of the conjugate axes and of the moment of inertia of bodies he enumerated the principle now known as "Binet's theorem". He is also recognized as the first to derive the rule for multiplying matrices in 1812, and Binet's formula expressing Fibonacci numbers in closed form is named in his honour, although the same result was known to Euler over a hundred years earlier.

Binet graduated from l'École Polytechnique in 1806, and returned as a teacher in 1807. He advanced in position until 1816 when he became an inspector of studies at l'École. He held this post until November 13, 1830, when he was dismissed by the recently crowned King Louis-Philippe of France, probably because of Binet's strong support of the previous King, Charles X. In 1823 Binet succeeded Delambre in the chair of astronomy at the "Collège de France". He was made a Chevalier in the Légion d'Honneur in 1821, and was elected to the Académie des Sciences in 1843.

:"Portions from the 1910 [http://www.catholic-forum.com/saints/indexncd.htm New Catholic Dictionary] "

ee also

Binet–Cauchy identity

References

* John J O'Connor and Edmund F Robertson, 2005. [http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Binet.html Jacques Philippe Marie Binet] . Retrieved November 21, 2005.
* William A. McWorter Jr., 2005. [http://www.cut-the-knot.org/arithmetic/Fibonacci.shtml When the Counting Gets Tough, the Tough Count on Mathematics] . Retrieved November 21, 2005.