Young Inequality
For 
,
- Disdyakis Dodecahedron
- Disdyakis Triacontahedron
- Disjoint
- Disjunction
- Disjunctive Game
- Disk
- Disk Covering Problem
- Disk Lattice Points
- Dispersion Numbers
- Dispersion Relation
- Dispersion (Sequence)
- Dispersion (Statistics)
- Disphenocingulum
- Disphenoid
- Dissection
- Dissection Puzzles
- Dissipative System
- Distance
- Distinct Prime Factors
- Distribution
- Distribution Function
- Distribution (Functional)
- Distribution Parameter
- Distribution (Statistical)
- Distributive