Simple finite non-Abelian flavor groups

Abstract
The recently measured unexpected neutrino mixing patterns have caused a resurgence of interest in the study of finite flavor groups with two- and three-dimensional irreducible representations. This paper details the mathematics of the two finite simple groups with such representations, the icosahedral group A 5 , a subgroup of S O ( 3 ) , and P S L 2 ( 7 ) , a subgroup of S U ( 3 ) .