The code for backward bifurcation of epidemiological models?

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Eric L Siegel

There's some good cononical language in this paper/pre-print, and in the supplemental material that may be translated into code. What program do you use for your work? That may help guide a little better

Article Backward bifurcation analysis of epidemiological model with ...

Preprint Backward bifurcation of a disease-severity-structured epidem...