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 ...

Some applications to the Ricci flow of left-invariant metrics on Lie groups concerning diagonalization are also given. This monthly journal, begun in 1950, is devoted entirely to research in pure and ...

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 ...