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.
- First Digit Phenomenon
- First Multiplier Theorem
- Fischer Groups
- Fischer's Baby Monster Group
- Fish Bladder
- Fisher-Behrens Problem
- Fisher Index
- Fisher Kurtosis
- Fisher's Block Design Inequality
- Fisher's Estimator Inequality
- Fisher's Exact Test
- Fisher Sign Test
- Fisher Skewness
- Fisher's Theorem
- Fisher's z-Distribution
- Fisher's z'-Transformation
- Fisher-Tippett Distribution
- Fitting Subgroup
- Five Cubes
- Five Disks Problem
- Five Tetrahedra Compound
- Fixed
- Fixed Element
- Fixed Point
- Fixed Point (Differential Equations)