The Annals of Mathematical Statistics, Vol. 17, No. 3 (Sep., 1946), pp. 336-343 (8 pages) The enlargement principle provides techniques for inverting any nonsingular matrix by building the inverse ...

A hyper-invertible matrix is a matrix whose every non-trivial square sub-matrix is invertible. Any m-by-n matrix induces a (linear) mapping from n input values to m output values; if the matrix is ...

A matrix is said to be of Toeplitz type if it has equal elements along diagonals. These matrices, with the additional property of symmetry, arise frequently in statistical work, as covariance matrices ...