Prime Ideal
An Ideal 
such that if 
, then either 
or 
.
- Married Couples Problem
- Marshall-Edgeworth Index
- Martingale
- Mascheroni Constant
- Mascheroni Construction
- Maschke's Theorem
- Mason's abc Theorem
- Mason's Theorem
- Masser-Gramain Constant
- Match Problem
- Matchstick Graph
- Mathematical Induction
- Mathematics
- Mathematics Prizes
- Mathieu Differential Equation
- Mathieu Function
- Mathieu Groups
- Matrix
- Matrix Addition
- Matrix Decomposition Theorem
- Matrix Diagonalization
- Matrix Direct Product
- Matrix Equality
- Matrix Equation
- Matrix Exponential