French mathematician and professor born in Chalon-sur-Saône, Burgundy, of great importance for the development of analysis. He published Nouveau precis of analyse infinitésimale (1872). He studied at the École Normale Supérieure in Paris (1854 -1857).
After graduation, he taught at the Lycée de St Quentin for two years and stopped teaching for seven while he lived in a village near Chalon-sur-Saône, where he was only studying and researching. He returned to teaching (1866), now staying a year at the University of Lyon until he was hired as a professor of mathematics at the University of Dijon, where he remained for the rest of his life.
Recognized as a mathematical genius, he was an authority on irrational numbers, having published the first paper in history on the subject: Remarques sur the nature of quantities defines the condition of serving as limits to the variables données (1869), anticipating the revolutionary theory of Singer. He returned to publishing on the subject with the book Nouveau précis d'analyse infinitésimale (1872), revised by Hermann Laurent (1873). He later published a series of papers (1872-1894) on analysis and died in Dijon, France.
Source: http://www.dec.ufcg.edu.br/biografias/
Order H - Biography - Brazil School
Source: Brazil School - https://brasilescola.uol.com.br/biografia/hugues-charles.htm