Groups and Group Actions: Lecture 14
Theorem of the week 2018-03-12
Summary:
In which we explore groups of order and encounter Cauchy’s Theorem. Lemma 62: Let be a prime, let be a group of order . Then is Abelian. We saw last time that the centre of , , is non-trivial, so in this case it must have order (and so be the whole group, making Abelian) or […]