Achille Brocot (1817–1878) was a French clockmaker and amateur mathematician. He is known for his discovery (independently of and contemporaneously with German number theorist Moritz Stern) of the Stern–Brocot tree, a mathematical structure useful in approximating real numbers by rational numbers; this sort of approximation is an important part of the design of gear ratios for clocks. He also made many other horological innovations including refinement of his father Louis-Gabriel's Brocot escapement and the development of clocks with perpetual calendar mechanisms.
- Player, J. W. (ed.), Britten's Watch & Clock Makers' Handbook Dictionary & Guide (15th ed.), Taylor & Francis, p. 380.
- Mansuy, Roger, Achille Brocot, mathématicien à ses heures (French), CultureMath.
- Hayes, Brian (2008), "On the Teeth of Wheels", Group Theory in the Bedroom, and Other Mathematical Diversions, Hill and Wang.
- Kirk, John G., The Brocots: A Dynasty of Horologers. Powerpoint presentation based on Chavigny (1991).
- Chavigny, Richard (1991), Les Brocot: une dynastie d'horlogers (FrenchISBN 978-2-88175-003-8), Antoine Simonin, .
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