%0 Journal Article %A Tuomas Hytönen %A Andreas Rosén %T Bounded variation approximation of $L_p$ dyadic martingales and solutions to elliptic equations %J Journal of the European Mathematical Society %D 2018 %P 1819-1850 %V 20 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/800/ %R 10.4171/jems/800 %F JEMS_2018_20_8_a0