Groups and Group Actions: Lecture 11
Theorem of the week 2018-03-12
Summary:
In which we meet and explore quotient groups. Definition of the centre of a group. Proposition 51: Let be a group. Then . The proof is an exercise. Proposition 52: Let be a group, let be a subgroup of . Define a binary operation on via . This is well defined if and only if . If , […]