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# Bertrand-Chebyshev theorem

Definition from Dictionary, a free dictionary

Life's a bitch, and life's got lots of sisters.

Ross Presser## English

Wikipedia### Etymology

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

### Noun

**Bertrand-Chebyshev theorem**

- (Template loop detected: Template:context 1) the theorem that there is at least one prime number between
*n*and 2*n*for every*n*>1, i.e.:- <math>\forall n\in\mathbb{N}:n>1\Rightarrow\exists p\in\mathbb{P}:n<p<2n</math>

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