Pseudo almost periodic solutions for a class of nonlinear Duffing system with a deviating argument (Q499985)

The authors study the concept of pseudo almost periodic solution for a class of Duffing equation with variable delay. Pseudo almost periodic functions are generations of almost periodic functions. There are several results on the applications of these functions in differential equations. Here, the authors use the theory of exponential dichotomy and the contraction mapping principle to prove their results. An example is also provided.