Oscillation Theorems for Second-Order Forced Neutral Nonlinear Differential Equations with Delayed Argument

الملخص EN

We are concerned with the oscillation of the forced second-order neutral nonlinear differential equations with delayed argument in the form (r(t)(x(t)+a(t)x(σ(t)))′)′+p(t)f(x(τ(t)))+∑i=1nqi(t)|x(t)|λisngx(t)=e(t).

No restriction is imposed on the potentials p(t), qi(t), ande(t) to be nonnegative.

Our methodology is somewhat different from those of previous authors.