When a correlation matrix is singular (less than full rank), some variables are linear functions of other variables, and a g2 inverse for the matrix is displayed. The g2 inverse depends on the order ...

In this paper, we present a useful result on the structures of circulant inverse M-matrices. It is shown that if the n×n nonnegative circulant matrix A = Circ[c₀, c₁ · · ·, cn-1] is not a positive ...