- mass centre
- mass-luminosity relation
- master equation
- matching
- matching
- matching
- matching
- matching matroid
- matching number
- matching of a graph
- matching of source and channel
- matching polytope
- mate number
- material axiomatic system
- material derivative
- material unbounded theorem
- mathematial theory of communication
- mathematical analysis
- mathematical cartography
- mathematical definition of general system based on set theory
- mathematical definition of general systems
- mathematical demography
- mathematical ecology
- mathematical economics
- mathematical expectation