Mathematician:François Viète

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French amateur mathematician, trained in law, who became a privy councillor under Henry IV of France.

Contributed to many of the early developments of trigonometry and algebra.

Pioneered the use of letters in algebraic equations.

One of the first to use decimal fractions as a matter of course in his published works.




  • Born: 1540, Fontenay-le-Comte, Poitou (now Vendée), France
  • Died: 13 Dec 1603 in Paris, France


Results named for François Viète can be found here.


  • Ad harmonicon coeleste (never published)
  • 1571+:
    • Francisci Vietœi universalium inspectionum ad canonem mathematicum liber singularis
    • A book of Trigonometry, in abbreviated Canonen mathematicum
  • 1589: Deschiffrement escription of a letter by the Commander Moreo at Roy Espaigne of his master
  • 1591: In Artem Analyticam Isagoge
  • 1593: Supplementum Geometriae
  • 1595: Ad Mathematics Problema quod Omnibus Totius Orbis Construendum Proposuit Adrianus Romanus, Vietae responsum Francisci
  • 1600: Numbers Potestatum ad Exegesim Resolutioner
  • 1602: Francisci Vietae Fontenaeensis libellorum supplicum Regia magistri in relatio Kalendarii Gregorian vere ad ecclesiasticos doctores exhibits Pontifici Maximi Clementi VIII

Also known as

François Viète is also known by the Latin form of his name Franciscus Vieta.