Following up the original post, we explain how modeling is simplified by a shift in perspective from composing structured cospans in categorical style to composing structured multicospans in operadic style.| blog.algebraicjulia.org
Structured cospans are a categorical method for turning closed systems into open ones. We show how structured cospans of Petri nets can be used to construct complex epidemiological models in a compositional way.| blog.algebraicjulia.org