Formulas
- Associated graded ring
- Association scheme
- Associative algebra
- Associative bialgebroid
- Assouad dimension
- Autocorrelation (words)
- Automatic differentiation
- Automatic group
- Automatic semigroup
- Automatic sequence
- Automorphic L-function
- Automorphic factor
- Automorphic form
- Automorphic function
- Automorphic number