Week 2

Week 1, Cosets, $$\mathbb{Z}/n\mathbb{Z}$$.

Lecture 4
Review, kernels, normality; Examples; Centers and inner autos.

Read: 1st, 1.4. 2nd, ?.

L4.1 and L4.2 refers to the exercises that are available in the homework pdf for this lecture.

Lecture 5
Equivalence relations; Cosets; Examples.

Read: 1st, 2.5, 2.6 and 2.9 to prepare for the next lecture. 2nd, ?.

Lecture 6
Congruence mod n; $$(\mathbb{Z}/n\mathbb{Z})^*$$.

Read: 1st, 2.10. 2nd, ?.