Abstract:

The following nonlinear neutral delay equations  ［x(t)+cx(t-τ)］⁽ⁿ⁾ +g(t,x(t-σ))=p(t) is discussed. By using the coincidence degree theory, a sufficient condition for the existence of periodic solution of the equation is given, which generalizes the known results.

Key words:  neutral delay equation; nonlinear; periodic solution