Nicknames:  "Felix Mendelssohn brotherinlaw" 
Birthdate:  
Birthplace:  Düren, North RhineWestphalia, Germany 
Death:  Died in Göttingen, Lower Saxony, Germany 
Occupation:  famed mathematician 
Managed by:  Yigal Burstein / יגאל בורשטיין 
Last Updated: 
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About Johann Peter Gustav Lejeune Dirichlet
Johann Peter Gustav Lejeune Dirichlet (From Wikipedia)
Function Theory Mathematician, Known for Dirichlet function, Dirichlet eta function
Johann Peter Gustav Lejeune Dirichlet (German pronunciation: [ləˈʒœn diʁiˈkleː]; 13 February 1805 – 5 May 1859) was a German mathematician credited with the modern formal definition of a function.
Biography
His family was from Richelette, a small community 5 km north east of Liège in Belgium, from which his surname "Lejeune Dirichlet" ("le jeune de Richelette", French for "the youth from Richelette") was derived.
Dirichlet was born in Düren, where his father was the postmaster. He learned from Georg Ohm at the Jesuit gymnasium in Cologne. His first paper was on Fermat's last theorem comprising a partial proof for the case n = 5, which was completed by AdrienMarie Legendre, one of the referees. Dirichlet completed his own proof almost at the same time; later he produced a full proof for the case n = 14.
He graduated from the University of Bonn in 1827 and taught as a Privatdozent at the University of Breslau, later teaching at the University of Berlin. In 1855 Dirichlet began teaching at the University of Göttingen and was appointed to fill the vacant chair of Carl Friedrich Gauss upon the latter's death. In 1854, he was elected a foreign member of the Royal Swedish Academy of Sciences.
In 1831, he married Rebecca Henriette Mendelssohn Bartholdy, who came from a distinguished family of converts from Judaism to Christianity; she was a granddaughter of the philosopher Moses Mendelssohn, daughter of Abraham Mendelssohn Bartholdy and a sister of the composers Felix Mendelssohn Bartholdy and Fanny Mendelssohn.
Ferdinand Eisenstein, Leopold Kronecker, and Rudolf Lipschitz were his students. After his death, Dirichlet's lectures and other results in number theory were collected, edited and published by his friend and fellow mathematician Richard Dedekind under the title Vorlesungen über Zahlentheorie (Lectures on Number Theory). Dirichlet's brain is preserved in the anatomical collection of the University of Göttingen, along with the brain of Gauss.
See also (in Wiki):
* Theorems named Dirichlet's theorem:
o Dirichlet's approximation theorem (diophantine approximation)
o Dirichlet's theorem on arithmetic progressions (number theory, specifically prime numbers)
o Dirichlet's theorem on diophantine approximation (number theory and approximation)
o Dirichlet's unit theorem (algebraic number theory and rings)
* Dirichlet beta function
* Dirichlet cell, polygon
* Dirichlet characters (number theory, specifically Zeta and Lfunctions. 1831)
* Dirichlet conditions (Fourier series)
* Dirichlet convolution (number theory and Arithmetic functions)
* Dirichlet density (number theory)
* Dirichlet distribution (probability theory)
* Dirichlet form
* Dirichlet kernel (functional analysis, Fourier series)
* Dirichlet problem (partial differential equations)
* Dirichlet series (analytic number theory)
* Dirichlet stability criterion (Dynamical systems)
* Dirichlet's test (analysis)
* Dirichlet tessellation, also called a Voronoi diagram (geometry)
* Dirichlet boundary condition (differential equations)
* Dirichlet function (topology)
* Pigeonhole principle/Dirichlet's box (or drawer) principle (combinatorics)
* Dirichlet divisor problem (currently unsolved) (Number theory)
* Dirichlet eta function (number theory)
* Latent Dirichlet allocation
* Class number formula
* Dirichlet integral
* Dirichlet principle
* Generalized Dirichlet distribution (probability theory)
* Dirichlet process
Gustav Lejeune Dirichlet's Timeline
1805 
February 13, 1805

Düren, North RhineWestphalia, Germany


1831 
1831
Age 25

Germany


1833 
July 2, 1833
Age 28



1837 
1837
Age 31



1840 
November 9, 1840
Age 35



1845 
February 12, 1845
Age 39

Florence, Tuscany, Italy


1855 
1855
 1859
Age 49

Goettingen, Germany


1859 
May 5, 1859
Age 54

Göttingen, Lower Saxony, Germany


1859
Age 53

Göttingen, Lower Saxony, Germany


???? 
 present

Berlin, Germany
