In this paper it is shown that, given a complex square matrix A all of whose leading principal minors are nonzero, there is a diagonal matrix D such that the product DA of the two matrices has all its ...

The S matrix is special because it is diagonal and so its inverse is easy to compute -- just invert the diagonal elements. The Vh matrix (sometimes named Vt) is special because its inverse equals the ...

This paper proposes a novel shrinkage estimator for high-dimensional covariance matrices by extending the Oracle Approximating Shrinkage (OAS) of Chen et al. (2009) to target the diagonal elements of ...

Theoretical ecologists study matrix eigenvalues (λi) of the stability matrix S = DA to determine local stability [where diagonal matrix D =diag ()].