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  4. 13
  5. Peter Gustav Lejeune Dirichlet

Births on February 13

Peter Gustav Lejeune Dirichlet
1805Feb, 13

Peter Gustav Lejeune Dirichlet

Peter Gustav Lejeune Dirichlet, German mathematician and academic (d. 1859)
Johann Peter Gustav Lejeune Dirichlet (German: [ləˈʒœn diʀiˈkleː]; 13 February 1805 – 5 May 1859) was a German mathematician who made deep contributions to number theory (including creating the field of analytic number theory), and to the theory of Fourier series and other topics in mathematical analysis; he is credited with being one of the first mathematicians to give the modern formal definition of a function.

Although his surname is Lejeune Dirichlet, he is commonly referred to as just Dirichlet, in particular for results named after him.


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