Formulas
- Depth of noncommutative subrings
- Derangement
- Derivation (differential algebra)
- Derivator
- Derived category
- Riesz–Thorin theorem
- Derived functor
- Descartes' rule of signs
- Descent (mathematics)
- Determinant method
- Determinantal point process
- Developable surface
- Deviation (statistics)
- Right-hand rule
- Donaldson's theorem