Formulas
- Dini test
- Diophantine equation
- Dirac delta function
- Dirac measure
- Direct product of groups
- Directed acyclic graph
- Dirichlet's unit theorem
- Dirichlet eigenvalue
- Dirichlet eta function
- Discrete-time Fourier transform
- Discrete Fourier transform
- Discrete Laplace operator
- Discriminant
- Disintegration theorem
- Disjoint union