科研之友
微信
新浪微博
Facebook
分享链接
摘要
We establish oscillation criteria for the second-order elliptic differential equation del . (A(x)del y) B(T) (x)del y q(x)f(y) = e(x), x is an element of Omega, where Omega 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 annulus of Omega, rather than on the whole exterior domain Omega. Both the cases when partial derivative b(i)/partial derivative x(i) exists for all i and when it does not exist for some i are considered.
