%0 Journal Article
%A Uffe Haagerup
%A Steen Thorbjørnsen
%T A new application of random matrices: Ext$(C^*_{\mathrm{red}}(F_2))$ is not a group
%J Annals of mathematics
%D 2005
%P 711-775
%V 162
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4007/annals.2005.162.711/
%R 10.4007/annals.2005.162.711
%G en
%F 10_4007_annals_2005_162_711