The stability analysis of discrete Hopfield neural networks not only has an important theoretical significance, but also can be widely used in the associative memory, combinatorial optimization, etc. The dynamic behavior of asymmetric discrete Hopfield neural network is mainly studied in partial simultaneous updating mode, and some new simple stability conditions of the networks are presented by using the Lyapunov method and some analysis techniques. Several new sufficient conditions for the networks in partial simultaneous updating mode converging towards a stable state are obtained. The results established here improve and extend the corresponding results given in the earlier references. Furthermore, we provide one method to analyze and design the stable discrete Hopfield neural networks.
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