François Budan de Boislaurent

Ferdinand François Désiré Budan de Boislaurent (1761–1840) was a French mathematician, best known for enunciating the Fourier transform in 1807 and 1811, although his demonstration was not altogether accurate, and, although being published before Joseph Fourier's explanation, was discovered afterwards.

François Budan was born in Limonade, Cap-Francis, Saint-Domingue (now Haiti) on September 28, 1761.

Budan was educated in Juilly, France before studying medicine in Paris where he received his doctorate degree for his thesis entitled "Essai sur cette question d'économie médicale : Convient-il qu'un malade soit instruit de sa situation?"

In 1803, Budan made his greatest mathematical discovery, with a rule which explains how a polynomial equation may have "n" real roots between two given numbers. The rule was published in 1807, and his proof was prepared in 1811 and published in 1822.

Budan died in Paris on October 6, 1840.

Published works

*"Nouvelle méthode pour la résolution des équations numériques d'un degré quelconque", Dondey-Dupré, Paris, 1822

ources

* [http://www-history.mcs.st-andrews.ac.uk/Biographies/Budan_de_Boislaurent.html Bio at School of Mathematics and Statistics, University of St Andrews, Scotland]
* [http://www.gap-system.org/~history/Mathematicians/Budan_de_Boislaurent.html Ferdinand François Désiré Budan de Boislaurent bio at gap-system.org]
* [http://math-doc.ujf-grenoble.fr/cgi-bin/edbm_LiNuM_fr/LiNuM/LiNuM_fr.html?first=1&maxdocs=1000&au=Budan+de+Boislaurent,&type=html&format=complete Livres Numérisés Mathématiques, Université Joseph Fourier]
* [http://mathnet.kaist.ac.kr/API/?MIval=people_seek_great&init=B The MathNet, Korea]