Oscillation criteria for a class of nonlinear neutral differential equations

摘要

In this paper, we deal with the oscillation of the second order nonlinear neutral differential equations of the form ( a ( t ) ( x ( t ) + δ p ( t ) x ( t − τ ) ) ′ ) ′ + f ( t , x ( t − σ ) ) − g ( t , x ( t − ρ ) ) = 0 . $$igl(a(t) igl(x(t)+ delta p(t)x(t-au)igr)' igr)'+figl(t, x(t-sigma)igr)-gigl(t,x(t-ho)igr)=0. $$ The oscillation criteria for these equations have been obtained. Furthermore, examples are given to illustrate the criteria, respectively.