Artin's Reciprocity Theorem
A general Reciprocity Theorem for all orders. If 
is a Number Field and 
a finite integralextension, then there is a Surjection from the group of fractional Ideals prime to thediscriminant, given by the Artin symbol. For some cycle 
, the kernel of this Surjection contains eachPrincipal fractional Ideal generated by an element congruent to 1 mod .
- Determinant (Binary Quadratic Form)
- Determinant Expansion by Minors
- Determinant (Knot)
- Determinant Theorem
- Developable Surface
- Deviation
- Devil on Two Sticks
- Devil's Curve
- Devil's Staircase
- Diabolical Cube
- Diabolical Square
- Diabolo
- Diacaustic
- Diagonalization
- Diagonal Matrix
- Diagonal Metric
- Diagonal (Polygon)
- Diagonal (Polyhedron)
- Diagonal Ramsey Number
- Diagonal Slash
- Diagonal (Solidus)
- Diagonals Problem
- Diagram
- Diameter
- Diameter (General)