<math>\mathbf{V}^*\mathbf{M}^*\mathbf{M}\mathbf{V} = \bar{\mathbf{D}} = \begin{bmatrix}\mathbf{D} & 0 \\ 0 & 0\end{bmatrix},</math> | <math>\mathbf{V}^*\mathbf{M}^*\mathbf{M}\mathbf{V} = \bar{\mathbf{D}} = \begin{bmatrix}\mathbf{D} & 0 \\ 0 & 0\end{bmatrix},</math> |