I've read about complex mathematical things like Tensors, Hilbert Space, and so on. To my uninformed mind it appears they are used as if they are special and specific to Physics. But then I read another thread in this forum where an example was given applying to biology. And I think I've seen discussions of economics using similar terms. I have to admit I've always thought these things were special and only related to the "big physics" I was never smart enough to grasp. But now it seems like they're really just generic man-made as it were, tools that could apply to all kinds of mundane things. Somebody restore my feeling that physicists (whom I regard as special and gifted people for the bigness of their subject) considering the universe and space and time and fundamental particles aren't using the same tools as economists studying the buying habits of populations of shoppers at malls.