Biography of carl henri lebesque death

Henri Lebesgue was born on 28 June in Beauvais , Oise.

Lebesgue held his post at the Sorbonne until when he was promoted to Professor of the Application of Geometry to Analysis.

Lebesgue's father was a typesetter and his mother was a school teacher. His parents assembled at home a library that the young Henri was able to use. His father died of tuberculosis when Lebesgue was still very young and his mother had to support him by herself. In he earned his PhD from the Sorbonne with the seminal thesis on "Integral, Length, Area", submitted with Borel, four years older, as advisor.

Lebesgue married the sister of one of his fellow students, and he and his wife had two children, Suzanne and Jacques.

Henri L£on Lebesgue was born in and died in He studied at the Ecole Normale Superieure, and his first post appears to have been that of maitre des conferences at Rennes, .

After publishing his thesis, Lebesgue was offered in a position at the University of Rennes , lecturing there until , when he moved to the Faculty of Sciences of the University of Poitiers. Henri Lebesgue died on 26 July in Paris. Lebesgue's first paper was published in and was titled "Sur l'approximation des fonctions". It dealt with Weierstrass 's theorem on approximation to continuous functions by polynomials.

The first of these, unrelated to his development of Lebesgue integration, dealt with the extension of Baire's theorem to functions of two variables. The next five dealt with surfaces applicable to a plane, the area of skew polygons , surface integrals of minimum area with a given bound, and the final note gave the definition of Lebesgue integration for some function f x.

The first chapter develops the theory of measure see Borel measure. In the second chapter he defines the integral both geometrically and analytically. The next chapters expand the Comptes Rendus notes dealing with length, area and applicable surfaces. The final chapter deals mainly with Plateau's problem.