Fundamental Components of Deep Learning (category theory) [pdf]

For those that don't know Bruno, he's one of the organizers for https://cats.for.ai/

He also maintains an "Awesome-$X" like Github page for ML and Category Theory: https://github.com/bgavran/Category_Theory_Machine_Learning

I have no association with him and I doubt he knows who I am. But I thought there is enough interest here in both ML and Category Theory that others might be interested in this.