Index of a normal subgroup
The **index** of a normal subgroup $G'$ of a group $G$, denoted $[G:G']$, is the order of the quotient group $G / G'$.
The L-functions and modular forms database: Index of a normal subgroupmathswitch — infrastructure for relaying and exchanging mathematical concepts
The **index** of a normal subgroup $G'$ of a group $G$, denoted $[G:G']$, is the order of the quotient group $G / G'$.
The L-functions and modular forms database: Index of a normal subgroup