Ex-OpenAI researcher Scott Aaronson explains how AI is breaking mathematical limits once thought impossible, including a 50-year barrier to multiplying numbers: "A month ago we saw a solution of the Navier-Stokes problem, one of the seven millennium problems. If water were an infinitely divisible substance, just following the laws of classical physics, in finite time some of the water would get accelerated to an infinite speed." "There’s now a way to multiply two n-digit integers in time that…