Guy Henniart

{{Short description|French mathematician (born 1953)}}

{{Use dmy dates|date=October 2023}}

File:Henniart Le Gall.jpg at the 2006 ICM in Madrid, Spain.]]

Guy Henniart (born 1953, Santes) is a French mathematician at Paris-Sud 11 University. He is known for his contributions to the Langlands program, in particular his proof of the local Langlands conjecture for GL(n) over a p-adic local field—independently from Michael Harris and Richard Taylor—in 2000.{{cite journal |last=Henniart |first=Guy |author-mask=3 |title=Une preuve simple des conjectures de Langlands pour GL(n) sur un corps p-adique |journal=Inventiones Mathematicae |volume=139 |issue=2 |year=2000|pages=439–455 |doi=10.1007/s002220050012 |bibcode=2000InMat.139..439H |s2cid=120799103 }}

Henniart attained his doctorate from the University of Paris V in 1978, under supervision of Pierre Cartier with thesis Représentations du groupe de Weil d’un corps local. He was a member of Nicolas Bourbaki.{{citation|title=Bourbaki: a secret society of mathematicians|first=Maurice|last=Mashaal|publisher=American Mathematical Society|year=2006|page=17|isbn=978-0-8218-3967-6|url=https://books.google.com/books?id=-CXn6y_1nJ8C&pg=PA17}}. Henniart was an invited speaker at the International Congress of Mathematicians in 2006 at Madrid and gave a talk On the local Langlands and Jacquet-Langlands correspondences.