Invariant submodule
= Invariant submodule
{title2=$M^G$}
For a group $G$ acting on a module $M$, the invariant submodule is $M^G=\{m\in M:g\cdot m=m\text{ for all }g\in G\}$.
= Invariant submodule
{title2=$M^G$}
For a group $G$ acting on a module $M$, the invariant submodule is $M^G=\{m\in M:g\cdot m=m\text{ for all }g\in G\}$.