On the oscillation of forced second order mixed-nonlinear elliptic equations

Abstract

Oscillation theorems are established for forced second order mixed-nonlinear elliptic differential equations (div(A(x) ∇y p−1 ∇y) + b(x), ∇y p−1 ∇y + C(x, y) = e(x), C(x, y) = c(x)|y| p−1 y + m P i=1 ci(x)|y| p i −1 y under quite general conditions. These results are extensions of the recent results of Sun and Wong, [