Formulas
- Differential algebra
- Differential calculus
- Differential form
- Differential forms on a Riemann surface
- Differential geometry
- Differential geometry of surfaces
- Differential graded algebra
- Digamma function
- Dihedral group
- Dimension
- Dimension (graph theory)
- Dimension theorem for vector spaces
- Dimension theory (algebra)
- Dimensionless quantity
- Dini derivative