death_date death_place birth_place image_size nationality field work_institutions birth_date image article_title name
26 july 1941 paris , france beauvais , oise , france 225px french mathematics university of rennes 28 june 1875 lebesgue 2.jpeg henri lebesgue
 henri lebesgue
henri lebesgue

henri léon lebesgue -lrb- ; june 28 , 1875 -- july 26 , 1941 -rrb- was a french mathematician most famous for his theory of integration , which was a generalization of the 17th century concept of integration -- summing the area between an axis and the curve of a function defined for that axis .
his theory was published originally in his dissertation `` intégrale , longueur , aire '' -lrb- `` integral , length , area '' -rrb- at the university of nancy during 1902 .
