I had a discreet mathematics professor that proved to us that he was god. I forget how he did it; I remember being unimpressed and stuck to the notion that there is only one God and he wasn't it.
BTW, I don't mean to imply that the professor was discreet, only that the math was discreet and that he was the professor of such.
Math is "discrete". People are "discreet". ;^)