%0 Journal Article %A Tristan Rivière %T Exploring the unknown: The work of Louis Nirenberg on partial differential equations %J EMS surveys in mathematical sciences %D 2022 %P 1-29 %V 9 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4171/emss/52/ %R 10.4171/emss/52 %F 10_4171_emss_52