Figure 2From: Complex dynamics in an SIS epidemic model with nonlinear incidenceWhen \(R^{*}< R_{0}<1\), \(\varLambda>(1-\sigma)/a\). (a) \(\psi_{3}<0\), equilibria \(E_{0}\) and \(E_{3}\) are locally stable and \(E_{2}\) is unstable. (b) \(\psi_{3}>0\), equilibrium \(E_{0}\) is locally stable and \(E_{2}\) and \(E_{3}\) are unstableBack to article page