Integral Averaging Technique for Oscillation of Elliptic Equations of Second Order

Abstract

" The elliptic differential equations of second order \\sum^n_{i,j=1}D_i[A_{ij}(x, y)D_jy] + P(x, y) + Q(x, y, ∇y) = e(x), x ∈ Ω . will be considered in an exterior domain Ω⊂ R^n, n ≥ 2. Some oscillation criteria are given by integral averaging technique."