Results 121 to 130 of about 256 (175)

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  

An upper bound for the Z-spectral radius of adjacency tensors. [PDF]

open access: yesJ Inequal Appl, 2018
Wu ZY, He J, Liu YM, Tian JK.
europepmc   +1 more source

Spectral top-down recovery of latent tree models. [PDF]

open access: yesInf inference, 2023
Aizenbud Y   +7 more
europepmc   +1 more source

Sombor characteristic values of cographs. [PDF]

open access: yesHeliyon
Raza Z, Rather BA, Imran M.
europepmc   +1 more source

On the use of larger bulges in the QR algorithm

open access: yes, 2008
. The role of larger bulges in the QR algorithm is controversial. Large bulges are infamous for having a strong, negative influence on the convergence of the implicit shifted QR algorithm.
Daniel Kressner
core  

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