Formulas
- Mixing (mathematics)
- Almost disjoint sets
- Almost holomorphic modular form
- Almost perfect number
- Almost periodic function
- Almost ring
- Almost simple group
- Andreotti–Frankel theorem
- Annihilator method
- Anosov diffeomorphism
- Modes of convergence
- Module (mathematics)
- Modulo (mathematics)
- Modulus (algebraic number theory)
- Monad (category theory)