On oscillatory nonlinear second order neutral delay differential equations

摘要

In this work, we investigate the oscillation criteria for second order neutral delay dif- ferential equations of the form (r(t)[y(t)+p(t)y( δ (t))] ) + q(t)G(y( τ (t))) = 0 and (r(t)[[y(t)+p(t)y( δ (t))] ] α ) + q(t)(y β ( τ (t))) = 0, where α and β are the ratio of odd positive integers.