The ordinal structure of the fixed point set of a monotone operator acting in a partially ordered space is studied. Stability conditions for the fixed point set under changes in the monotone operator are obtained. Based on these results, a boundary value problem and a control system for the differential equation of a neural network—a Hopfield-type model of the electrical activity of the brain with a continuous and a discontinuous activation function—are analyzed.
Zhukovskiy et al. (Sat,) studied this question.