Bertrand-Chebyshev theorem

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From the surname of Joseph Louis François Bertrand, who conjectured the theorem, and the surname of Pafnuty Chebyshev who proved it.

Proper noun[edit]

Bertrand-Chebyshev theorem

  1. (mathematics) the theorem that there is at least one prime number between n and 2n for every n>1, i.e.: