Ernest Vessiot

Ernest Vessiot ( born March 8, 1865 in Marseille, † October 17, 1952 in La Bauche, Savoie, France) was a French mathematician

Vessiot was the son of a teacher and school inspector and attended high school in Marseille. He studied at the École normale supérieure ( in their entrance exams after Jacques Hadamard, he was second, with whom he studied ) and then from 1887 was a teacher in Lyon. In 1892 he received his doctorate and then taught in Lille and from 1910 in Paris, where he became director of the École normale supérieure. In 1935, he went into retirement.

Vessiot worked on differential equations and especially the use of continuous groups ( eg, linear groups of transformations, the subject of his PhD thesis) for their solution. He also wrote an article about differential equations in the Encyclopedia of Mathematical Sciences. During World War II he worked on ballistics.