[[Exponential|Exponentiating]] any [[02 Areas/Math/Matrix|Matrix]] to the power of $n\in \Z^+$ is only valid if the [[02 Areas/Math/Matrix|Matrix]] is square, $A\in M_{m\times m}$.
$\huge
\forall A\in M_{m\times m}, N \in \Z :{
A^N = \prod^N A
}
$
By definition any
By definition, any [[Matrix]]