Question: The SIR model has many equilibria, defined by S = I = R = 0. Let's consider where these equilibria exist. a. Sketch a representative

The SIR model has many equilibria, defined by S = I = R = 0. Let's consider where these equilibria exist. a. Sketch a representative SI phase plane for the SIR model, showing one possible orbit (i.e. progression of an epidemic).

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