%0 Journal Article %A TERENCE TAO %T FAILURE OF THE $L^{1}$ POINTWISE AND MAXIMAL ERGODIC THEOREMS FOR THE FREE GROUP %J Forum of Mathematics, Sigma %D 2015 %V 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fms.2015.28/ %R 10.1017/fms.2015.28 %G en %F 10_1017_fms_2015_28