I understand that it’s an introductory article and that the audience must be generalists however I would like to see what this mathematical model is. They expl

I understand that it’s an introductory article and that the audience must be generalists however I would like to see what this mathematical model is. They explain it with a lot of prose but give no definitions, properties, or proofs. Maybe they should leave out the “mathematical” part if that isn’t what they meant.