We present a non-linear mathematical model which analyzes the spread of smoking in a population. In this paper, the population is divided into …ve classes: potential smokers, occasional smokers, heavy smokers, temporary quitters and permanent quitters. We study the e¤ect of considering the class of occasional smokers and the impact of adding this class to the smoking model in [1] on the stability of its equilibria. Numerical results are also given to support our results.Mathematics Subject Classi…cation: 34D23, 91D10
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