Michel Paul Lazard (5 December 1924 – 15 September 1987) was a French mathematician who worked on the theory of Lie groups in the context of p-adic analysis.
Born in Paris, Lazard studied at the University of Paris–Sorbonne, where he obtained his Ph.D. in 1954 under the direction of Albert Châtelet, with thesis titled Sur les groupes nilpotents et les anneaux de Lie.
His work took on a life of its own in the hands of Daniel Quillen in the late 20th century.
Quillen's discovery, that a ring Lazard used to classify formal group laws was isomorphic to an important ring in topology, led to the subject of chromatic homotopy theory.
[a][2][3] In 1972, he was awarded the Prix Poncelet by the Académie des Sciences for his work on algebra.