Quantitative continuation from a measurable set of solutions of elliptic equations

Consider an open bounded connected set Ohm in R-n and a Lebesgue measurable set E subset of subset of Ohm of positive measure. Let u be a solution of the strictly elliptic equation D-i(a(ij)D(j)u) = 0 in Ohm, where a(ij) is a n element of C-0,C-1(<(Ohm)over bar>) and {a(ij)} is a symmetric matrix. As sume that /u/ less than or equal to epsilon in E. We quantify the propagati on of smallness of u in Ohm.