Hyperchaos and bifurcation in a new class of four-dimensional Hopfield neural networks

In this paper, we demonstrate complex hyperchaotic dynamics in a four-dimensional Hopfield neural networks. The Lyapunov spectrum is calculated in a range of parameters, the peak-bifurcation plot and several important phase portraits are presented as well. (c) 2006 Elsevier B.V. All rights reserved.