Improved sufficient conditions for global asymptotic stability of delayed neural networks

This brief addresses the global asymptotic stability (GAS) of delayed neural networks. Based on the Lyapunov method, using some existing results for the existence and uniqueness of the equilibrium point, some sufficient conditions are obtained for checking the GAS without demanding the boundedness and differentiability hypotheses for activation functions. Through comparison, it is illustrated that our conditions extend and improve some recent results. Index Terms--Delayed neural networks, equilibrium point, global asymptotic stability (GAS), Lyapunov functional.