$\mathbf{P}$ and $\mathbf{Q}$ are square matrices. Consider the following
$\mathrm{X}:\left(\mathbf{P}^{-\mathbf{1}}\right)^{-1}=\mathbf{P}$
Y: Symmetric if $\mathbf{Q}=-\mathbf{Q}^{\mathrm{T}}$
The correct choice is
- $\mathrm{X}$ is TRUE; $\mathrm{Y}$ is FALSE
- $\mathrm{X}$ is FALSE; $\mathrm{Y}$ is TRUE
- Both $\mathrm{X}$ and $\mathrm{Y}$ are TRUE
- Both $\mathrm{X}$ and $\mathrm{Y}$ are FALSE
