Formulas
- Connected sum
- Connection (principal bundle)
- Matrix of ones
- Matrix representation of conic sections
- Matrix splitting
- Maurer–Cartan form
- Max Planck
- Maximal and minimal elements
- Connection (vector bundle)
- Maxime Bôcher
- Mayer–Vietoris sequence
- Mean
- Mean value theorem
- Measurable acting group
- Measure (mathematics)