Results 61 to 70 of about 480 (138)

Hermitian Symmetric Matrices, the Schur-Horn Theorem, and Constructibility

open access: yes, 2002
A theorem first published in 1923 by Schur showed how the diagonal\ud elements of a Hermitian symmetric matrix are related to its eigenvalues.\ud Thirty-one years later, the converse was proved by Horn, and together\ud these results became known as the ...
Au, Andrew F.
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Spectra of random matrices [PDF]

open access: yes, 2022
The recent interest of the scientific community about the properties of networks is based on the possibility to study complex real world systems by renouncing the exact knowledge of the nature of system itself.
Martina, Silvia
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On the choice of preconditioner for minimum residual methods for non-Hermitian matrices

open access: yes, 2013
We consider the solution of left preconditioned linear systems P- 1Cx=P-1c, where P,CECn×n are non-Hermitian, cECn, and C, P, and P-1C are diagonalisable with spectra symmetric about the real line.
Wathen, Andrew J.   +3 more
core   +1 more source

On the Existence of the Moments of the Asymptotic Trace Statistic [PDF]

open access: yes
In this note we establish the existence of the first two moments of the asymptotic trace statistic, which appears as weak limit of the likelihood ratio statistic for testing the cointe- gration rank in a vector autoregressive model and whose moments may ...
Deniz Dilan Karaman Örsal, Bernd Droge
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On Matrix Trace Inequalities and Related Topics for Products of Hermitian Matrices

open access: yes, 1994
Alternative proofs of some simple matrix trace inequalities of Bellman [in "General Inequalities 2, Proceedings, 2nd International Conference on General Inequalities" (E. F. Beckenbach, Ed.), pp. 89-90, Birkhäuser, Basel, 1980], Neudecker [J. Math, Anal.
Coope, I.D.
core   +1 more source

Multivariable moments and sums of Hermitian squares

open access: yes, 2011
This chapter shows how five closely related problems become vastly different when one considers the multivariable case. In a similar way, various natural sums of Hermitian squares problems that one may consider in the multivariable case all come down to ...
Hugo J. Woerdeman, Mihály Bakonyi
core   +1 more source

Perturbative and non-perturbative studies in low dimensional quantum field theory [PDF]

open access: yes, 2007
A relevant perturbation of a conformal field theory (CFT) on the half-plane, by both a bulk and boundary operator, often leads to a massive theory with a particle description in terms of the bulk S-matrix and boundary reflection factor R.
Lishman, Anna Rebecca
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