Spectrum Sequence
A spectrum sequence is a Sequence formed by successive multiples of a Real Number 
rounded down to thenearest Integer 
. If is Irrational, the spectrum is called aBeatty Sequence.
- Degree (Vertex)
- Dehn Invariant
- Dehn's Lemma
- Dehn Surgery
- de Jonquières Theorem
- de Jonquières Transformation
- Del
- de la Loubere's Method
- Delannoy Number
- Delaunay Triangulation
- Delian Constant
- Delian Problem
- de Longchamps Point
- Del Pezzo Surface
- Delta Amplitude
- Delta Curve
- Delta Function
- Deltahedron
- Delta Sequence
- Delta Variation
- Deltoid
- Deltoidal Hexecontahedron
- Deltoidal Icositetrahedron
- Deltoid Caustic
- Deltoid Evolute