Joseph Louis François Bertrand

1822 - 1900

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Bertrand was a Paris professor who, in 1845, conjectured:
I've told you once and I'll tell you again
There's always a prime between n and 2n.
This was proved by Chebyshev in 1850.
Full MacTutor biography [Version for printing]
List of References (13 books/articles)

A Quotation

A Poster of Joseph Bertrand

Mathematicians born in the same country

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Additional Material in MacTutor

  1. Introduction to Bertrand's work on probability
  2. A comment from Thomas Hirst's diary

Honours awarded to Joseph Bertrand
(Click below for those honoured in this way)
Fellow of the Royal Society1875

Other Web sites
  1. École Polytechniqes archives (in French)
  2. Académie Française; (in French)
  1. Cut the Knot (Bertrand's paradox)
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