Visual Group Theory, Lecture 3.3: Normal subgroups

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Visual Group Theory, Lecture 3.3: Normal subgroups

A subgroup H of G is normal if every left coset gH equals the right coset Hg. In this lecture, we see several different ways of visualizing this concept as well as several equivalent definitions. We conclude with three useful but different ways to check whether a subgroup is normal. In many cases, one of these will be much easier than the other two.

Course webpage (with lecture notes, HW, etc.): http://www.math.clemson.edu/~macaule/...

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