I got a vague association to Penrose’s graphical tensor notation https://en.m.wikipedia.org/wiki/Penrose_graphical_notation https://en.m.wikipedia.org/wiki/Pen

I got a vague association to Penrose’s graphical tensor notation https://en.m.wikipedia.org/wiki/Penrose_graphical_notation https://en.m.wikipedia.org/wiki/Penrose_graphical_notation There are a lot of examples in modern physics where people have come up with graphical notations to handle the kind of recursive complexity found in the article. There’s a lot of low-hanging fruit to be discovered in the last century of physics. Especially now that Machine Learning is all the buzz about tensors.