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Hermitian Matrix Polynomials with Real Eigenvalues of Definite Type.
Part I: Classification
(with Maha Al-Ammari),
MIMS EPrint 2010.9, January 2010.
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Hermitian Quadratic Matrix Polynomials: Solvents and Inverse Problems
(with Peter Lancaster), MIMS EPrint 2010.10, January 2010.
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The Canonical Generalized Polar Decomposition
(with
Nick Higham and
ChristianMehl), MIMS EPrint 2009.52, July 2009.
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A Framework for Analyzing Nonlinear Eigenproblems
and Parametrized Linear Systems
(with Laurence Grammont and Nick Higham ),
MIMS EPrint 2009.51, July 2009.
To appear in Linear Algebra Appl.
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Deflating Quadratic Matrix Polynomials with Structure Preserving
Transformations
(with Seamus D. Garvey and
Christopher Munro),
MIMS EPrint 2009.22, March 2009.
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An Improved Arc Algorithm for Detecting Definite Hermitian Pairs
(with Chun-Hua Guo and
Nick Higham,
SIAM J. Matrix Anal. Appl. 31(3), 1131-1151, 2009.
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Definite Matrix Polynomials and their Linearization by Definite Pencils
(with Nick Higham and
D. Steven Mackey), SIAM J. Matrix Anal. Appl. 31(2), 478-502, 2009.
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NLEVP: A Collection of Nonlinear Eigenvalue Problems
(with
Timo Betcke,
Nick Higham,
Volker
Mehrmann and
Christian Schroder),
MIMS EPrint 2008.40, April 2008.
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Detecting and Solving Hyperbolic Quadratic Eigenvalue Problems
(with
Chun-Hua Guo and
Nick Higham),
SIAM J. Matrix Anal. Appl., 30(4):1593-1613, 2009.
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On the Definition of Two Natural Classes of Scalar Product.
(With D. Steven Mackey and
Niloufer Mackey,
MIMS EPrint 2007.64, April 2007 (revised February 2009).
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Scaling, Sensitivity and Stability in the Numerical Solution of
Quadratic Eigenvalue Problems
(With Nick Higham,
D. Steven Mackey,
Seamus D. Garvey), MIMS EPrint 2006.406, November 2006.
Internat. J. Numer. Methods Eng., 73(3):344-360, 2008.
Published version.
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Structured Mapping Problems for Matrices Associated with Scalar Products
Part I: Lie and Jordan Algebras
(With D. Steven Mackey and
Niloufer Mackey,
SIAM J. Matrix Anal. Appl., 29(4):1389-1410, 2008.
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Backward Error of Polynomial Eigenproblems Solved by Linearization
(With
Nick Higham and
Ren-Cang Li),
SIAM J. Matrix Anal. Appl., 29(4):1218-1241, 2007.
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Symmetric Linearizations for Matrix Polynomials
(With
Nick Higham),
D. Steven Mackey and
Niloufer Mackey,
SIAM J. Matrix Anal. Appl., 29(1):143-159, 2006.
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Structured Condition Numbers and Backward Errors in Scalar Product Spaces
(with
Stef Graillat).
Electronic Journal of Linear Algebra (15):159-177, 2006.
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Structured Eigenvalue Condition Numbers
(with Michael Karow and Daniel Kressner),
SIAM J. Matrix Anal. Appl. 28(4):1052-1068, 2006.
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The Conditioning of Linearizations of Matrix Polynomials
(with Nick Higham
and D. Steven Mackey),
SIAM J. Matrix Anal. Appl. 28(4):1005-1028, 2006.
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Structured Factorizations in Scalar Product Spaces,
(with D. S. Mackey and N. Mackey)
SIAM J. Matrix Anal. Appl., 27(3):821-850, 2006.
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Functions Preserving Matrix Groups and Iterations for the Matrix
Square Root
(With Nick Higham,
D. Steven Mackey and
Niloufer Mackey,
SIAM J. Matrix Anal. Appl. 26(3):849-877, 2005.
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The Ehrlich-Aberth Method for the Nonsymmetric Tridiagonal
Eigenvalue Problem
(With Dario A. Bini and Luca Gemignani).
SIAM J. Matrix Anal. Appl. 27(1):153-175, 2005.
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Computing the Polar Decomposition and the Matrix Sign Decomposition
in Matrix Groups
(With Nick Higham,
D. Steven Mackey and
Niloufer Mackey).
SIAM J. Matrix Anal. Appl. 25(4):1178-1192, 2004.
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G-Refectors: Analogues of Householder Transformations
in Scalar Product Spaces
,
(with D. S. Mackey and N. Mackey)
Linear Algebra Appl. 385: 187-213, 2004.
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Structured Tools for Structured Matrices
,
(with D. S. Mackey and N. Mackey)
Electronic Journal of Linear Algebra, (10):106-145, 2003.
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Tridiagonal-diagonal Reduction of Symmetric Indefinite Pairs
,
SIAM J. Matrix Anal. Appl. 26(1):215-232, 2004.
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Simultaneous Tridiagonalization of Two Symmetric Matrices
,
(with S. D. Garvey, M. I. Friswell, J. E. T. Penny and U. Prells)
Int. J. Numer. Meth. Engng.,57(12):1643-1660, 2003.
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A Chart of Backward Errors and Condition Numbers for
Singly and Doubly Structured Eigenvalue Problems,
SIAM J. Matrix Anal. Appl., 24(3):877-897, 2003.
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Implicit Gamma Theorems (I): Pseudoroots and Pseudospectra
(with Jean-Pierre Dedieu, Myong-Hi Kim and Michael Shub),
Found. Comput. Math. 3:1-31, 2003.
Published version, in
Pdf form.
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Detecting a Definite Hermitian Pair
and a Hyperbolic or Elliptic Quadratic Eigenvalue Problem,
and Associated Nearness Problems
(with
Nick Higham and Paul Van Dooren),
Linear Algebra Appl., 351-352:455-474, 2002.
Published version, in
Pdf form.
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More on Pseudospectra for Polynomial Eigenvalue Problems
and Applications in Control Theory
(with Nick Higham),
Linear Algebra Appl., 351-352:435-453, 2002.
Published version, in
Pdf form.
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Perturbation Theory for Homogeneous Polynomial Eigenvalue Problems
(with Jean-Pierre Dedieu),
Linear Algebra Appl., 358:71-94, 2003.
Published version, in
Pdf form.
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Bounds for Eigenvalues of Matrix Polynomials
(with Nick Higham),
Linear Algebra Appl., 358:5-22, 2003.
Published version, in
Pdf form.
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The Quadratic Eigenvalue Problem
(with Karl Meerbergen),
SIAM Review, (43)2:235-286,2001.
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Analysis of the Cholesky Method with Iterqative Refinement for
Solving the Symmetric Definite Generalized Eigenproblem
(with Philip Davies and Nick Higham),
SIAM J. Matrix Anal. Appl., 23(2):472-493, 2001.
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Structured Pseudospectra for Polynomial Eigenvalue Problems,
with Applications
(with Nick Higham),
SIAM J. Matrix Anal. Appl., 23(1):187-208, 2001.
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Stability of Structured Hamiltonian Eigensolvers
SIAM J. Matrix Anal. Appl., 23(1): 103-125, 2001.
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Newton's Method in Floating Point Arithmetic
and Iterative Refinement of Generalized Eigenvalue Problems
SIAM J. Matrix Anal. Appl., 22(4): 1038-1057, 2001.
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A Block Algorithm for Matrix 1-Norm Estimation,
with an Application to 1-Norm Pseudospectra
(With Nick Higham).
SIAM J. Matrix Anal. Appl., 21(4): 1185-1201, 2000.
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Backward Error and Condition of Polynomial Eigenvalue Problems
Linear Algebra Appl., 309(1-3):339-361, 2000.
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A Parallel Divide and Conquer Algorithm for the Symmetric Eigenvalue
Problem on Distributed Memory Architectures.
(With Jack Dongarra).
SIAM J. Sci. Comput., 20(6): 2223-2236, 1999.
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Parallel Implementation of a
Symmetric Eigensolver Based on the Yau and Lu Method (with
S. Domas),
Lecture Notes in Computer Science 1215, pp.140-153, 1997.
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Parallel Implementation of the Yau and Lu Method for Eigenvalue
Computation,
Int. Journal of Supercomputer Appl. and High Performance Comp.,
11(3), pp.197-204, 1997.
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PVM Precise Eigenvalue Computations
(with M. Ahues and A. Largillier),
in J. Dongarra, M. Gengler, B. Tourancheau, X. Vigouroux, editors,
EuroPVM'95, volume 5 of Parallelisme, Reseaux et Repartition,
pp. 253-258, Hermes, Paris, 1995.
Technical Reports