Positive solutions of nonlinear second-order elliptic inequalities in unbounded domains (Q1267462)

The inequalities \(Lu\geq F(x,u)\) are considered, where \(\Omega\subset \mathbb{R}^n\) is an unbounded domain, \[ L= \sum^n_{i,j=1} {\partial\over\partial x_i} \Biggl(a_{ij}(x){\partial\over\partial x_j}\Biggr) \] is an elliptic operator with measurable coefficients, and \(F\) is some given function. The theory has no illustrative examples.