Identity Matrix

Identity Matrix

Updated: October 27, 2020
Linear-Algebra Math

\begin{equation} \mathbf{I}(\mathbf{X})=\mathbf{X} \end{equation}

Where any \(nxn\) matrix is established via the Kronecker Delta, e.g.

\begin{equation} \mathbf{I}_{ij}\,=\,\delta_{ij} \end{equation}