%0 Journal Article %A Xu-Jia Wang %T Counterexample to the convexity of level sets of solutions to the mean curvature equation %J Journal of the European Mathematical Society %D 2014 %P 1173-1182 %V 16 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/457/ %R 10.4171/jems/457 %F JEMS_2014_16_6_a1