More on Groups: Morphisms, Normal Subgroups, etc...
In the previous entry More Introductory Group Theory, we introduced the definition of a group and also provided some lemmas to help us understand their basic structure a little better. It wasn’t as thorough as what you’d find in most Abstract Algebra books, though. But we did manage to introduce various morphisms, or maps between groups that preserve parts of their structure. Here we’ll continue with that theme…