Results 21 to 30 of about 53 (52)

Relative Perturbation Bound for Invariant Subspaces of Indefinite Hermitian Matrix

open access: yes, 1998
We give bound for the perturbations of invariant subspaces of nonsingular indefinite Hermitian matrix H under relative additive perturbations of H. Such perturbations include the case when the elements of H are known up to some relative tolerance.
Ivan Slapnicar, Ninoslav Truhar
core  

Polynomial Numerical Hulls of Matrices

open access: yes, 2007
. For any n-by-n complex matrix A, we use the joint numerical range W(A,A 2,..., A k) to study the polynomial numerical hull of order k of A, denoted by V k (A). We give an analytic description of V 2 (A) when A is normal.
Chi-kwong Li, Ler Davis, Abbas Salemi
core  

A Note On The Field Of Values Of Non-Normal Matrices

open access: yes, 2007
. It is shown that the distance from zero of the field of values of a matrix A depends on how large the departure from normality is compared to the distance from the zero of the field of values of the normal part of A.
Ilse C. F. Ipsen
core  

Regularity of non-stationary subdivision: a matrix approach. [PDF]

open access: yesNumer Math (Heidelb), 2017
Charina M   +3 more
europepmc   +1 more source

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