ProofWiki:Potw

Current Proof of The Week Lagrange's Theorem

Previous proofs of the week
 * Quadratic Equation
 * Handshake Lemma
 * Cantor-Bernstein-Schroeder Theorem
 * Euler's formula
 * Fermat's Little Theorem
 * Cantor's Theorem
 * There are Infinitely many primes
 * The Binomial Theorem
 * There exist irrational a and b such that a^b is rational
 * Law of Cosines
 * Pythagoras's Theorem