"Mathematics is a part of physics."

It's kind of amazing how quickly that article got so wrong. Math isn't a subset of physics. Physics is the estranged brother of Math, always needing to borrow some money from him or else the power goes out or he can't afford food or some other sob story.

If you ever found yourself lost in Plato's cave, you'd be super confused as to what those black splotches on the cave wall are.