3 Set Theory

Section 3.1: Introduction
Section 3.2: Everything is a set
Section 3.3: Classes
Section 3.4: Ordinals
Section 3.5: The hierarchy of sets
- Lemma 3.5.1
Section 3.6: Cardinality
Section 3.7: Cofinality
- Lemma 3.7.1
- Proposition 3.7.2
Section 3.8: Reflection principle
- Theorem 3.8.1
Section 3.9: Constructing categories of schemes
- Lemma 3.9.1
  - Equation 3.9.1.1
- Lemma 3.9.2
- Remark 3.9.3
- Lemma 3.9.4
- Lemma 3.9.5
- Lemma 3.9.6
- Lemma 3.9.7
- Lemma 3.9.8
- Lemma 3.9.9
- Remark 3.9.10
- Lemma 3.9.11
- Lemma 3.9.12
Section 3.10: Sets with group action
- Lemma 3.10.1
- Lemma 3.10.2
Section 3.11: Coverings of a site
- Lemma 3.11.1
- Remark 3.11.2
Section 3.12: Abelian categories and injectives
- Lemma 3.12.1