Gérard Laumon

Gérard Laumon was a French mathematician, born in 1952 and died on 4 October 2025, who worked in number theory and the Langlands program. He studied at the École Normale Supérieure and at Paris-Sud 11 University in Orsay. In 1987 Vladimir Drinfeld and Laumon formulated the geometric Langlands conjecture for general linear groups over a function field, and in 2008 Laumon and Ngô Bảo Châu proved the fundamental lemma for unitary groups, a component of the Langlands program in number theory. He was awarded the Silver Medal of the CNRS in 1987, the E. Dechelle prize of the French Academy of Sciences in 1992 and the Clay Research Award in 2004, and in 2012 he became a fellow of the American Mathematical Society.