On two functions of a matrix with positive definite Hermitian part
The two functions are \(H(A^{-1})^{-1}\) and \(A^{-1}A^H\) where \(H(A)\) is the Hermitian part of \(A\) and \(A^H\) is the conjugate transpose. The author obtains new and improved bounds for norms and eigenvalues when we perturb \(A\) to some \(A+E\).
scientific article; zbMATH DE number 931939