delay 
It is a fact that the feedback delay actually arises in digital control systems.


Global attractivity in a generalized delay logistic equation


In this paper we further study the delay differential equation


In this paper, a sufficient condition for boundedness and persistence of the solutions of the following delay difference equation is obtained.


Linearized oscillations of delay differential equations and applications


The necessary and sufficient conditions for the oscillations of every solution of the nonlinear delay equation x(t)+f(itx(tl))+g(itx([tk])) = 0 are oblained.


In this paper, the higherorder neutral differential equation with continuous distributed delay is concerned and the oscillatory criteria are given.


Furthermore, a similar result to the periodic boundary value problem of functional differential equations with infinite delay is established.


Distribution of zeros of solutions of first order delay differential equations


The paper gives two estimates of the distance between adjacent zeros of solutions of the firstorder delay differential equations x'(t)+p(t)x(tτ)=0 in the case when p(t)≥0 and oscillates or p(t) itself oscillates.


Multiple positive solutions of a singular (n1, 1) conjugate boundary value problem with delay


Oscillation of first order delay differential equations with oscillating coefficients


Oscillation of delay differential equations with piecewise constant argument


The delay differential equation with piecewise constant argument x'(t)+a(t)x(t)+b(t)x ([tk])=0 is considered, where a(t) and b(t) are continuous functions on [k, ∞), b(t)≥0, k is a positive integer and [·] denotes the greatest integer function.


Existence of positive solutions and 1/cglobal attractivity of a nonlinear delay difference equation with variable coefficients


Global asymptotic stability for a nonlinear delay difference equation


In this paper, a sufficient condition for the global asymptotic stability of the solutions of the following nonlinear delay difference equation is obtained, where aε [0,∞] and the initial values x2,x1,x0ε (0,∞).


The existence of a liapunov functional for linear delay system


Existence of positive solution for a twopatches competition system with diffusion and time delay and functional response


Analysis of an SIS epidemiologic model with variable population size and a delay

