concept is the Moore-Penrose pseudoinverse of $L$, denoted by
$\pseudoinverse{L}$. Finally, the rank of a matrix $L$ is
$\rank{L}$. As far as matrix spaces go, we have the $n$-by-$n$
concept is the Moore-Penrose pseudoinverse of $L$, denoted by
$\pseudoinverse{L}$. Finally, the rank of a matrix $L$ is
$\rank{L}$. As far as matrix spaces go, we have the $n$-by-$n$