Results 11 to 20 of about 192 (124)

Linearizations of rational matrices [PDF]

, 2021
Mención Internacional en el título de doctorThis PhD thesis belongs to the area of Numerical Linear Algebra. Specifically, to the numerical solution of the Rational Eigenvalue Problem (REP). This is a type of eigenvalue problem associated with rational
Quintana Ponce, María del Carmen
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On the solvability of an equation involving the Smarandache function and Euler function [PDF]

, 2008
In this paper, authors use the properties and the curve figure of two functions to study the solvability of an ...
Duany, Weiguo, Xue, Yanrong
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Dissipative matrices and related results [PDF]

, 1975
This paper gives a number of theorems extending or related to theorems obtained by Fan in an earlier paper on strictly dissipative matrices. The new results involve the eigenvalues of A -1A∗ and a determinantal inequality involving A and its Hermitian ...
Thompson, R.C.
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The spectral analysis of random graph matrices [PDF]

, 2018
A random graph model is a set of graphs together with a probability distribution on that set. A random matrix is a matrix with entries consisting of random values from some specified distribution.
Hu, Dan
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Unitary Integrators and Applications to Continuous Orthonormalization Techniques [PDF]

, 1994
This is the published version, also available here: http://dx.doi.org/10.1137/0731014.In this paper the issue of integrating matrix differential systems whose solutions are unitary matrices is addressed.
Russell, Robert D., Dieci, Luca, Van Vleck, Erik S.   +2 more
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Condicionamiento y alta precisión en problemas espectrales estructurados [PDF]

, 2007
Esta memoria trata dos aspectos relacionados con la precisión de algoritmos espectrales para problemas matriciales estructurados: 1) Se definen números de condición estructurados de autovalores múltiples, eventualmente defectivos, y se obtienen fórmulas ...
Peláez Montalvo, María José
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Canonical forms for symmetric/skew-symmetric real matrix pairs under strict equivalence and congruence [PDF]

, 2005
A systematic development is made of the simultaneous reduction of pairs of quadratic forms over the reals, one of which is skew-symmetric and the other is either symmetric or skew-symmetric.
P. Lancaster, L. Rodman, Lancaster, P., Rodman, L.   +3 more
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A fractional approach to minimum rank and zero forcing [PDF]

, 2015
This thesis applies techniques from fractional graph theory to develop fractional versions of graph parameters related to minimum rank and zero forcing.
Palmowski, Kevin
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Computable strict upper bounds for Krylov approximations to a class of matrix exponentials and φ-functions

, 2018
An a posteriori bound for the error of a standard Krylov approximation to the exponential of nonexpansive matrices is derived. This applies for instance to skew-Hermitian matrices which appear in the numerical treatment of Schr¨odinger equations.
Jawecki, Tobias, Auzinger, Winfried, Koch, Othmar   +2 more
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Principal rank characteristic sequences [PDF]

, 2017
The necessity to know certain information about the principal minors of a given/desired matrix is a situation that arises in several areas of mathematics. As a result, researchers associated two sequences with an $n \times n$ symmetric, complex Hermitian,
Martinez-Rivera, Xavier
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