On the Integrability of the SIR Epidemic Model with Vital Dynamics

<div>Phase portrait at infinity on the Poincaré ball of system (<a href="https://static.hindawi.com/articles/amp/volume-2020/5869275/figures/#EEq1">1</a>). 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Advances in Mathematical Physics

On the Integrability of the SIR Epidemic Model with Vital Dynamics

Figure 1