Sensitivity of eigenvalues of an unsymmetric tridiagonal matrix

Several relative condition numbers that exploit tridiagonal form are derived. Some of them use tridiagonal factorization instead of the matrix entries. A novel empirical condition number is used to show when perturbations are so large that the eigenvalue response is not linear. Some interesting exam...

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Bibliographic Details
Main Author: Ferreira, Carla (author)
Other Authors: Parlett, Beresford (author), Dopico, Froilán M. (author)
Format: article
Language:eng
Published: 2012
Subjects:
Online Access:http://hdl.handle.net/1822/17063
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/17063
Description
Summary:Several relative condition numbers that exploit tridiagonal form are derived. Some of them use tridiagonal factorization instead of the matrix entries. A novel empirical condition number is used to show when perturbations are so large that the eigenvalue response is not linear. Some interesting examples are examined in detail.