Formulas
- Abelian and Tauberian theorems
- Abelian category
- Abelian group
- Abelian integral
- Abelian variety
- Abel–Jacobi map
- Abel–Ruffini theorem
- Abhyankar–Moh theorem
- Abscissa and ordinate
- Absolute Galois group
- Absolute convergence
- Absolute irreducibility
- Absolute presentation of a group
- Absolutely integrable function
- Absolutely simple group