%0 Journal Article %T Repr¨¦sentations galoisiennes automorphes et cons¨¦quences arithm¨¦tiques des conjectures de Langlands et Arthur %A Ga£¿tan Chenevier %J Mathematics %D 2013 %I arXiv %X This is the memoir of my habilitation thesis, defended on March 29 th, 2013 (Universit\'e Paris XI). %U http://arxiv.org/abs/1307.5170v1