Mathematician:Achille Marie Gaston Floquet

Achille Marie Gaston Floquet was a French mathematician best known for his work in analysis, especially in theory of differential equations.

Nationality
French

History

 * Born: 15 Dec 1847 in Épinal, France
 * 1869: Entered École Normale Supérieure
 * 1870: Joined the army of the Loire as a second lieutenant, fought in Franco-Prussian War
 * 1871: Returned to his studies at the École Normale Supérieure
 * 1873: Completed his studies
 * 19 September 1873: Appointed to the Lycée de Belfort, took charge of the mathematics course.
 * 15 September 1875: Obtained his mathematics agrégation
 * 22 September 1875: Named as professor of elementary mathematics at the Lycée d'Angers
 * 8 November 1876: Appointed to position of professor of special mathematics at the Lycée de Clermont-Ferrand
 * 13 February 1878: Appointed maître de conférences at the Faculty of Science at Nancy
 * November 1879: Given a temporary appointment as a professor at Nancy
 * 1880: Put in charge of the mathematics course at Nancy
 * July 1880: Given a permanent chair
 * End of 1880: Holding the chair of pure mathematics and analysis
 * 1905: Appointed head of the Faculty of Science at Nancy
 * Died: 7 Oct 1920 in Nancy, France

Theorems and Definitions

 * Floquet System
 * Floquet's Theorem

Books and Papers

 * 1879: Sur la théorie des équations différentielles linéaires (On the theory of linear differential equations)
 * 1881: Sur les équations différentielles linéaires à coefficients périodiques (On linear differential equations with periodic coefficients) (First paper of that name)
 * 1881: Sur les équations différentielles linéaires à coefficients périodiques (On linear differential equations with periodic coefficients) (Second paper of that name)
 * 1883: Sur les équations différentielles linéaires à coefficients périodiques (On linear differential equations with periodic coefficients) (Third paper of that name)
 * 1884: Addition à un mémoire sur les équations différentielles linéaires (Addition to a memoir on linear differential equations)
 * 1884: Sur les équations différentielles linéaires à coefficients doublement périodiques (On linear differential equations with double periodic coefficients)
 * 1887: Sur une classe d'équations différentielles linéaires non homogènes (On a class of non-homogeneous linear differential equations)
 * 1888: Sur une propriété de la surface $$xyz = l^3$$ (On a property of the surface $$xyz = l^3$$)
 * 1889: Sur le mouvement d'un fil dans un plan fixe (On the movement of a cord in a fixed plane)
 * 1895: Sur l'équation de Lamé (on Lamé's equation)
 * 1898: Sur le mouvement d'un point ou d'un fil glissant sur un plan horizontal fixe lorsqu'on tient compte de la rotation de la terre et du frottement (On the movement of a point or a cord sliding on a fixed horizontal plane taking account of the rotation of the earth and of friction)
 * 1901: Sur les équations intrinsèques du mouvement d'un fil et sur le calcul de sa tension (On intrinsic equations of movement of a cord and of calculation of its tension)
 * 1902: L'astronome Messier