Category Theory in Epidemiology

This is a talk I gave at the Edinburgh Mathematical Society on December 4, 2023:

Abstract. “Stock and flow diagrams” are widely used for modeling in epidemiology. Modelers often regard these diagrams as an informal step toward a mathematically rigorous formulation of a model in terms of ordinary differential equations. However, these diagrams have a precise syntax, which can be explicated using category theory. Although commercial tools already exist for drawing these diagrams and solvin...