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Consider the general elliptic operator $M=\sum_{i,j=1}^na_{ij}(x)\frac{\partial^2}{\partial x_i\partial x_j},$ where $a_{ij}$ are continous functions. The function $u$ satisfies $|Mu|\leq A(|\nabla u|+u+k) \ \ in \ \ \Omega,$ if only if $Mu=b_i(x)\frac{\partial}{\partial x_i}u+c(x)u=kf(x),$ where $f$ and the coefficientes $b_i$, $c$ are measurable and are bounded in absolute value by a constant times $A$.

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