- Axioms for synthetic computability
- Halting problems
- Kleene trees
- CT in relation to other axioms
- Halting problem for the call-by-value lambda-calculus HaltL
- Decidability and Enumerability
- Propositional truth table reductions
- Bounded Turing reductions
- Turing reductions
- Bauer's Turing reductions
- Reducibility