- Arithmetical Hierarchy
- Prenex Normal Form
- Axioms for synthetic computability
- Halting problems
- Kleene trees
- CT in relation to other axioms
- Kleene-Post Theorem
- Post's Theorem
- Turing Jump
- Decidability and Enumerability
- Reducibility
- Many-one reducibility
- One-one reducibility
- Truth-table reducibility
- Total Turing reducibility
- Extensional dialogue trees
- Oracle Functionals and Turing Reducibility
- Lemmas about extensional dialogue trees
- Trees give rise to partial functions
- Closure properties of Oracle computability
- Lemmas about Turing reducibility
- Central results regarding Turing reducibility