Cayley's Group Theorem
Every Finite Group of order 
can be represented as a Permutation Group on letters, as first proved byCayley 
in 1878 (Rotman 1995).
References
Rotman, J. J. An Introduction to the Theory of Groups, 4th ed. New York: Springer-Verlag, p. 52, 1995.
- Max Sequence
- Maxwell Distribution
- May's Theorem
- May-Thomason Uniqueness Theorem
- Maze
- Mazur's Theorem
- McCay Circle
- McCoy's Theorem
- McLaughlin Group
- McMohan's Theorem
- McNugget Number
- Mean
- Mean Cluster Count Per Site
- Mean Cluster Density
- Mean Curvature
- Mean Deviation
- Mean Distribution
- Mean Run Count Per Site
- Mean Run Density
- Mean Square Error
- Mean-Value Theorem
- Measurable Function
- Measurable Set
- Measurable Space
- Measure