Existence and global exponential stability of periodic solution of cellular neural networks with time-varying delays ✩

By using the continuation theorem of Mawhin’s coincidence degree theory and Gronwall’s inequality, some new sufficient conditions are obtained ensuring existence and global exponential stability of periodic solution of cellular neural networks with periodic coefficients and delays. These results are helpful to design globally exponentially stable and oscillatory cellular neural networks.  2003 Elsevier Inc. All rights reserved