Abstract :
In this paper, we provide oscillation properties of every solution of the neutral differential equation with
positive and negative coefficients
x(t)− R(t)x(t −r) +P(t)x(t − τ)−Q(t)x(t − σ) = 0,
where R(t),P(t ), Q(t) ∈ C([t0,∞),R+), r >0, τ 0, σ 0.
© 2006 Elsevier Inc. All rights reserved.
