This is neat! I've been thinking about how to best express recursion with diagrams for tensorgrad (https://github.com/thomasahle/tensorgrad https://github.com/t

This is neat! I've been thinking about how to best express recursion with diagrams for tensorgrad (https://github.com/thomasahle/tensorgrad https://github.com/thomasahle/tensorgrad) and this might just be it. So much computation these days are done on tensors, mostly for easy parallelism reasons. But we can't get completely rid of recursion. Great to have work like this making them more computationally compatible!