Routh–Hurwitz Stability and Quasiperiodic Attractors in a Fractional-Order Model for Awareness Programs: Applications to COVID-19 Pandemic

Figure 1

Three-dimensional plots of the awareness program model (6) using the parameter set: (a) A; (b) B; (c) C; and (d) D.

(a)

(b)

(c)

(d)