摘要

This paper studies the asymptotic behavior of solutions of the nonlinear delay differential equation with impulses {x'(t) + p(t)f(x(t - tau)) = 0 t >= t(0), t not equal t(k), x(t(k)) = b(k)x(t(k)(-)) + (1-b(k)) integral(tk)(tk-tau)p(s+tau)f(x(s))ds k is an element of Z(+). Sufficient conditions are obtained under which every solution of the equation tends to a constant or zero as t -> infinity. Our results improve and generalize some known ones.