Oscillation theorems for nth-order neutral functional differential equations
In this paper, we consider the oscillation of nth-order neutral functional differential equations of mixed type with continuous delay of the form [x(t) + lambda ax(t - tau) + mu bx(t + tau)]((n)) + delta(integral(d)(c) q (t, xi)d xi + integral(d)(c) p(t, xi)x(t + xi)d xi) = 0, where delta = +/- 1, lambda = +/- 1, mu = +/- 1, and p, q are continuous and periodic functions for t. (c) 2005 Elsevier Ltd. All rights reserved.
oscillations neutral equations delay-differential equations