%0 Journal Article
%T Non simplicit¨¦ du groupe de Cremona sur tout corps
%A Anne Lonjou
%J Mathematics
%D 2015
%I arXiv
%X Using a theorem of Dahmani, Guirardel and Osin we prove that the Cremona group in 2 dimension is not simple, over any field. More precisely, we show that some elements of this group satisfy a weakened WPD property which is equivalent in our particular context to the Bestvina and Fujiwara's one.
%U http://arxiv.org/abs/1503.03731v2