This is often associated with cellular automata, and names like Konrad Zuse, John Von Neumann, Stephen Wolfram, etc. A version of it is an hexagonal cellular automata with very simple collision rules, not more complicated than the famous Rule 30 or 110, for 1D cellular automata. The world is not concerned with, or made with mathematics, mathematics just emerges, with inherent and irreducible complexity, from extreme simplicity. They work well logically, as a mathematical explanation, they can yield useful predictions, but they do not tell us what the world is and how it works, ultimately. Digital physics tells us, boldly: the world is a giant computer, and all the marvelous things that it does can be ultimately conceived as the results of computation.