A0 3. Rings and modules

Section 1: Definition of ring

• Exercise 1.13
• Exercise 1.14 ⭐
• Exercise 1.15

Section 5: Modules over a ring

• Notes
• Exercise 5.14
• Exercise 5.15
• Exercise 5.16
• Exercise 5.17
• Exercise 5.18

Section 6: Products, coproducts, etc., in $R\operatorname{-}{\rm Mod}$ ✅

• Notes
• Exercise 6.1
• Exercise 6.2
• Exercise 6.3
• Exercise 6.4
• Exercise 6.5
• Exercise 6.6
• Exercise 6.7
• Exercise 6.8
• Exercise 6.9 ⭐
• Exercise 6.10
• Exercise 6.11
• Exercise 6.12 ⭐
• Exercise 6.13
• Exercise 6.14
• Exercise 6.15
• Exercise 6.16
• Exercise 6.17
• Exercise 6.18 ⭐

Section 7: Complexes and homology

• Notes
• Exercise 7.1
• Exercise 7.2
• Exercise 7.3
• Exercise 7.4
• Exercise 7.5
• Exercise 7.6