一类时间轴上的一阶中立型微分方程的正解

On Positive Solutions of a Class of First Order Neutral Differential Equations on Time Scales

对时间轴上的具正负系数的一阶中立型动力方程(x(t)-c(t)x(t-τ))Δ+p(t)x(t-γ)-q(t)x(t-δ)=0进行了研究,这里c,p,q∈Crd([t0,∞),R+=[0,∞),γ>0,τ>δ≥0.获得了方程存在最终有界正解的一个充分条件.

This paper is concerned with the first order neutral dynamic eguation with positive and negative coeffcient differential equations on time scale:(x(t)-c(t)x(t-τ))~Δ+p(t)x(t-γ)-q(t)x(t-δ)=0 where,P.q∈C(rd)(to,∞),R^+=nonoscillatory for the above equation is obtained.