Lebesgue perturbation of a quasi-definite Hermitian functional. The positive definite case

Strictly Hermitian Positive Definite Functions

Let H be any complex inner product space with inner product < ·, · >. We say that f : | C → | C is Hermitian positive definite on H if the matrix ( f(< z,z >) )n r,s=1 (∗) is Hermitian positive definite for all choice of z, . . . ,z in H, all n. It is strictly Hermitian positive definite if the matrix (∗) is also non-singular for any choice of distinct z, . . . ,z in H. In this article we prove...

Positive Definite and Semi-definite Splitting Methods for Non-hermitian Positive Definite Linear Systems

In this paper, we further generalize the technique for constructing the normal (or positive definite) and skew-Hermitian splitting iteration method for solving large sparse nonHermitian positive definite system of linear equations. By introducing a new splitting, we establish a class of efficient iteration methods, called positive definite and semi-definite splitting (PPS) methods, and prove th...

Erratum: Perturbation of Partitioned Hermitian Definite Generalized Eigenvalue Problems

The main purpose of this erratum is to correct mistakes in the proof of Theorem 2.4 of [R.-C. Li et al., SIAM J. Matrix Anal. Appl., 32 (2011), pp. 642–663] and in the inequalities (2.23), (2.24), and (2.25) on p. 653 of the same paper.

Perturbation of Partitioned Hermitian Definite Generalized Eigenvalue Problems

This paper is concerned with the Hermitian definite generalized eigenvalue problem A− λB for block diagonal matrices A 1⁄4 diagðA11; A22Þ and B 1⁄4 diagðB11; B22Þ. Both A and B are Hermitian, and B is positive definite. Bounds on how its eigenvalues vary when A and B are perturbed by Hermitian matrices are established. These bounds are generally of linear order with respect to the perturbations...

Joint Approximate Diagonalization of Positive Definite Hermitian Matrices