By now, the so-called “hyperparameter transfer” technology has become a critical component of frontier artificial intelligence systems, including xAI’s Grok. It is made possible by Tensor Programs, a *nonlinear* random matrix theory in the same sense that neural networks are a nonlinear generalization of matrices. I will give an introduction to this theory. Still, many key mathematical questions remain, and they present a unique research area where mathematicians have direct control over the future of intelligence.