I most recently encountered this fact in The Man from the Future, a recent biography about John von Neumann. (The first half of it, the first 5 or 6 chapters w

I most recently encountered this fact in The Man from the Future, a recent biography about John von Neumann. (The first half of it, the first 5 or 6 chapters were good, but it goes off the rails after that.) I think by "physicists" I should have said, Heisenberg. I'm talking about this: https://en.wikipedia.org/wiki/Matrix_mechanics#Heisenberg's_reasoning https://en.wikipedia.org/wiki/Matrix_mechanics#Heisenberg's_... https://en.wikipedia.org/wiki/Heisenberg's_entryway_to_matrix_mechanics https://en.wikipedia.org/wiki/Heisenberg's_entryway_to_matri...