Mathematician:Charles de la Vallée Poussin

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Belgian mathematician famous for proving the Prime Number Theorem, independently of Jacques Salomon Hadamard in $1896$.




  • Born: 14 August 1866 in Louvain, Belgium
  • Died: 2 March 1962 in Louvain, Belgium

Theorems and Definitions

The Meissel-Mertens Constant, for Daniel Friedrich Ernst Meissel and Franz Mertens
Kronecker's Constant, for Leopold Kronecker
the Prime Reciprocal Constant

Definitions of concepts named for Charles de la Vallée Poussin can be found here.


  • 1903: Cours d'analyse (Volume 1)
    • 1909: Cours d'analyse (Volume 1) (2nd ed.)
    • 1914: Cours d'analyse (Volume 1) (3rd ed.)
    • 1921: Cours d'analyse (Volume 1) (4th ed.)
  • 1906: Cours d'analyse (Volume 2)
    • 1912: Cours d'analyse (Volume 2) (2nd ed.)
    • 1922: Cours d'analyse (Volume 2) (4th ed.)
  • 1916: Lebesgue integrals: Set functions: Baire classes
  • 1949: Le potential logarithmique

Also known as

Full name: Charles-Jean Étienne Gustave Nicolas, Baron de la Vallée Poussin.

Some sources hyphenate variously, for example: Charles-Jean de la Vallée-Poussin.

Variants on the capitalisation of the small words can be seen, for example: Charles-Jean De La Vallée-Poussin