Permutation Group
A finite Group of substitutions of elements for each other. For instance, the order 4 permutation group 
would rearrange the elements 
in the order 
. A SubstitutionGroup of two elements is called a Transposition. Every Substitution Group with 
elements can bewritten as a product of transpositions. For example,
 |  |  | |
 | |  |
Conjugacy Classes of elements which are interchanged are called Cycles (in the above example, the Cycles are
).See also Cayley's Group Theorem, Cycle (Permutation), Group, Substitution Group, Transposition- Acute Angle
- Acute Triangle
- Adams-Bashforth-Moulton Method
- Adams' Method
- Addend
- Addition
- Addition Chain
- Addition-Multiplication Magic Square
- Additive Persistence
- Adem Relations
- Adequate Knot
- Adiabatic Invariant
- Adjacency Matrix
- Adjacency Relation
- Adjacent Fraction
- Adjacent Value
- Adjacent Vertices
- Adjoint Curve
- Adjoint Matrix
- Adjoint Operator
- Adjugate Matrix
- Adjunction
- Adleman-Pomerance-Rumely Primality Test
- Adleman-Rumely Primality Test
- Admissible