By the end of this post you will understand how to list all (yes, all!) integers and rational numbers and why you can’t list the reals. You will also learn why this weird sequence of numbers is useful: \(1, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 5, … Continue reading Listing numbers