Bertrand-Chebyshev theorem

English

Etymology

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

Proper noun

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

   $\mathrm{\forall }n\in \mathbb{N}:n>1\Rightarrow \mathrm{\exists }p\in \mathbb{P}:n<p<2n$