Before concluding, here are a few words about the single equation that quantum theory adds to classical physics. It is a strange equation. It states that multiplying the position by the velocity is different from multiplying the velocity by the position. If position and velocity were numbers, there could be no difference, because 7 × 9 is the same as 9 × 7. But position and velocity are now tables of numbers, and when you multiply two tables, the order counts.
