Supercharacter formulas for pattern groups
Supercharacter formulas for pattern groups
C. Andre and N. Yan introduced the idea of a supercharacter theory to give a tractable substitute for character theory in wild groups such as the unipotent uppertriangular group $U_n(\mathbb {F}_q)$. In this theory superclasses are certain unions of conjugacy classes, and supercharacters are a set of characters which are …