### GT19. Cauchy's Theorem

Abstract Algebra: Cauchy's Theorem states that if p is a prime that divides the order of a finite group G, then there exists an element of order p. We give a proof using the class equation and, as an application, we show that the isomorphism class for a group of order 15 is unique. U.Reddit course materials available at http://ureddit.com/class/23794/intro-to-group-theory Master list at http://mathdoctorbob.org/UReddit.html

Length:
15:00