Abstract :
In this paper, by using the method of general means, some new oscillation criteria for forced functional
differential equations of the form
x(n)(t )+
n−1
i=1
aix(i)(t )+q(t)f x g(t) = e(t ), t0 0,
are established, where ai are real constants, q(t), f (t), e(t ), and g(t) are real continuous functions,
xf (x) > 0 whenever x = 0, and limt→∞g(t)=∞.
2003 Elsevier Science (USA). All rights reserved
