Itô's Theorem
The dimension 
of any Irreducible Representation of a Group 
must be a Divisor of the index ofeach maximal normal Abelian Subgroup of .
References
Lomont, J. S. Applications of Finite Groups. New York: Dover, p. 55, 1993.
- Inaccessible Cardinals Axiom
- Inadmissible
- In-and-Out Curve
- Incenter
- Incenter-Excenter Circle
- Incidence Axioms
- Incidence Matrix
- Incident
- Incircle
- Inclusion-Exclusion Principle
- Inclusion Map
- Incommensurate
- Incomplete Gamma Function
- Incompleteness
- Increasing Function
- Increasing Sequence
- Indefinite Integral
- Indefinite Quadratic Form
- Indegree
- Independence Axiom
- Independence Complement Theorem
- Independence Number
- Independent Equations
- Independent Sequence
- Independent Statistics