This paper focuses on the global exponential almost periodic synchronization of quaternion-valued neural networks with timevarying\ndelays. By virtue of the exponential dichotomy of linear differential equations, Banach�s fixed point theorem, Lyapunov\nfunctional method, and differential inequality technique, some sufficient conditions are established for assuring the existence\nand global exponential synchronization of almost periodic solutions of the delayed quaternion-valued neural networks, which\nare completely new. Finally, we give one example with simulation to show the applicability and effectiveness of our main results.
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