Here, we're gonna talk about sets. What will these sets contain? Other sets! Like a bunch of cardboard boxes that you open only to find more cardboard boxes, and so on all the way down.
You might ask “how is this relevant to a book on quantum computing?”
Well, hopefully we'll see a few answers later. For now, suffice it to say that math is the foundation of all human thought, and set theory – countable, uncountable, etc. – that's the foundation of math. So regardless of what a book is about, it seems like a fine place to start.
I probably should tell you explicitly that I’m compressing a whole math course into this chapter. On the one hand, that means I don't really expect you to understand everything. On the other hand, to the extent you ...