This is the symbol for the identity matrix. It behaves such that, for some matrix \(A\), \(AI = A\) and \(IA = A\)
This is the symbol for the identity matrix. It behaves such that, for some matrix \(A\), \(AI = A\) and \(IA = A\).
The symbol for the identity matrix is \(I\). It behaves such that, for some matrix \(A\), \(AI = A\) and \(IA = A\). It looks like a matrix of all zeros apart from the main diagonal which are ones. For the example of a 2 dimensional matrix it looks like:
\[I=\begin{bmatrix}1 & 0\\1 & 0\end{bmatrix}\]