Oscillation of second-order functional differential equations with mixed nonlinearities and oscillatory potentials

摘要

In this paper, we study oscillation of second-order functional differential equations with mixed nonlinearities where≥0,p(t)ec(0,),q(t),q_i(t),e(t)ec(0,),p(t)>0,α_1>...α_m>1>α_m+1>...>α_n>0(n>m≥1). Without assuming that q(t), q(t) and e(t) are nonneg-ative, the results given in [Y.G. Sun, F.W. Meng, Interval criteria for oscillation of second-order differential equations with mixed nonlinearities, Appl. Math. Comput. 198 (2008) 375-381 ] have been extended to the aforementioned functional differential equation.