The equilibrium state of a dynamical system can be divided into the equilibrium point and
limit cycle. In this paper, the stability analysis of the equilibrium point and limit cycle of …

In this paper, the global dynamics of an SEI epidemic model with constant immigration and
general nonlinear incidence function is investigated. It is shown that there is neither a …

This paper explores the effect of immigration in a generalized model that considers
susceptibles, infected, chronic carriers, and recovered, the incidence rate is considered as a …

In this paper we study a modified SEIR model with general incidence function of the form f
(s)[g (I 1)+ h (I 2)] where I 1 and I 2 are two infection categories different and the migration is …

In this paper, we proposed a generalization for a model that considers Susceptible, Infected,
Carrier, and Recovered by introducing a general incidence rate and considering migration …

This study develops a modified SIR model (Susceptible–Infected–Recovered) to analyze the
dynamics of the COVID-19 pandemic. In this model, infected individuals are categorized into …

In this paper, we propose a generalized SEI epidemic model with a general nonlinear
incidence rate and death rate functions. Furthermore, we consider that those who spread the …

COVID-19 has become a serious pandemic affecting many countries around the world since
it was discovered in 2019. In this research, we present a compartmental model in ordinary …

This paper investigates the global dynamic behavior and bifurcations of a classical
nonlinear transmission SIR epidemic model with discontinuous threshold strategy. Different …

COVID-19 has become a serious pandemic affecting many countries around the world since
it was discovered in 2019. In this research, we present a compartmental model in ordinary …