 Thierry Aubin

Thierry Aubin (6 May 1942 – 21 March 2009) was a French mathematician who worked at the Centre de Mathématiques de Jussieu, and was a leading expert on Riemannian geometry 
and non-linear partial differential equations.His fundamental contributions to the theory of the Yamabe equation led, in conjunction with
results of Trudinger and Schoen, to a proof of the Yamabe Conjecture