Proving That the Set of Odd Positive Integers is Countable

Learn how to construct a bijective function from positive integers to odd positive integers in this 12-minute mathematics video. Follow along with a detailed proof demonstrating that f(n) = 2n - 1 creates a one-to-one correspondence, establishing that the set of odd positive integers is indeed countable. Master fundamental concepts in set theory and number theory through this clear mathematical demonstration.