Lecture
This lecture discusses the concept of quotients of groups by relations of equivalence, exploring the conditions under which the set G / R is well defined. It covers the properties of equivalence relations, group operations, and the definition of a group. The lecture also delves into examples illustrating the application of these concepts, such as the group operation in modular arithmetic. Furthermore, it examines the properties of groups under specific relations, including the existence of inverses and the neutral element. The instructor demonstrates how to determine if a given set forms a group under a defined operation, providing insights into the fundamental principles of group theory.