BAIRE, Leçons sur les fonctions discontinues, 1930

New print.
René Baire (1874-1932) was a French mathematician, lecturer at the Faculty of Sciences of Montpellier, and a founding member of the French school of real function theory. His Leçons sur les fonctions discontinues (Lessons on Discontinuous Functions), edited by Arnaud Denjoy, is a fundamental work in the development of function theory in the early 20th century. It is particularly famous for introducing "Baire's classification" of functions, a crucial tool for studying discontinuities and topological properties of real functions.