No abstract

In this paper, we present some new oscillation criteria for the second-order nonlinear elliptic differential equationwhere is an exterior domain in R N . These criteria are different from most known ones in the sense that they are based on the information only on a sequence of annuals of in R N , rather than on the whole exterior domain . Also information about the distribution of the zero of solutions is obtained.

In this paper, some new oscillation criteria are obtained for second order elliptic differential equations with damping of the formwhere Ω is an exterior domain in R N . These criteria are different from most known ones in the sense that they are based on a class of new functions of the form Φ(r, s, l) defined in the sequel.