Commutative
Two elements 
and 
of a set 
are said to be commutative under a binary operation 
if they satisfy
Real numbers are commutative under addition
and multiplication
See also Associative, Distributive, Transitive
- Array
- Arrowhead Curve
- Arrow Notation
- Arrow's Paradox
- Art Gallery Theorem
- Articulation Vertex
- Artin Braid Group
- Artinian Group
- Artinian Ring
- Artin L-Function
- Artin Reciprocity
- Artin's Conjecture
- Artin's Constant
- Artin's Reciprocity Theorem
- Artistic Series
- ASA Theorem
- Aschbacher's Component Theorem
- A-Sequence
- Associative
- Associative Algebra
- Associative Magic Square
- ASS Theorem
- Astroid
- Astroidal Ellipsoid
- Astroid Evolute