Results 81 to 90 of about 442,498 (206)
Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 4, July/August 2026.ABSTRACT This article investigates the Soret–Dufour cross‐diffusion effects on radiation‐absorptive unsteady free‐convection of magnetized nanofluids ( TiO2–water and Cu–water) flow over a vertical moving permeable plate. The model integrates thermal source, chemical reactions, porous resistance, and thermal radiation. The water‐based nanofluids mixing
B. Prabhakar Reddy +2 more
wiley +1 more source
A Fast Algorithm for the Inverse of a Class of Tridiagonal Period Matrices in Signal Processing
, 2010 The Tridiagonal period Matrices, as an important tool, have much important applications ( such as in computational mathematics, physics, image processing and recognition, missile system design, nonlinear kinetics, economics and biology etc).
Chuan Dai Dong
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The Double Dyson Index β Effect in Non-Hermitian Tridiagonal Matrices. [PDF]
Entropy (Basel), 2023 Goulart CA, Pato MP.
europepmc +1 more source
Inverse Tridiagonal Z-Matrices
, 1996 In this paper, we consider matrices whose inverses are tridiagonal Z-matrices. Based on a characterization of symmetric tridiagonal matrices by Gantmacher and Krein, we show that a matrix is the inverse of a tridiagonal Z-matrix if and only if, up to a ...
H. Schneider +4 more
core
New norm equalities and inequalities for operator matrices
Journal of Inequalities and Applications, 2016 We prove new inequalities for general 2 × 2 $2\times2$ operator matrices. These inequalities, which are based on classical convexity inequalities, generalize earlier inequalities for sums of operators. Some other related results are also presented. Also,
Feras Ali Bani-Ahmad, Watheq Bani-Domi
doaj +1 more source
A characterization of tridiagonal matrices
Linear Algebra and its Applications, 1969 The purpose of this paper is to prove that symmetric irreducible tridiagonal matrices and their permutations are the only symmetric matrices (of order n > 2) the rank of which cannot be diminished to less than n - 1 by any change of diagonal elements. The main part of the proof was obtained as a byproduct of a minimum problem solution (cf. [l]).
openaire +1 more source
On Preserving Structured Matrices Using Double Bracket Operators: Tridiagonal and Toeplitz Matrices [PDF]
, 2001 In the algebra of square matrices over the complex numbers, denotes Two problems are solved: (1) Find all Hermitian matrices M which have the following property: For every Hermitian matrix A, if A is tridiagonal, then so is (2) Find all Hermitian ...
Driessel, Kenneth +2 more
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Eigenvalues and eigenvectors of tridiagonal matrices [PDF]
, 2006 This paper is continuation of previous work by the present author, where explicitformulas for the eigenvalues associated with several tridiagonal matrices were given. In this paperthe associated eigenvectors are calculated explicitly. As a consequence, a
Kouachi, Said
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Explicit inverses of some tridiagonal matrices
, 2001 We give explicit inverses of tridiagonal 2-Toeplitz and 3-Toeplitz matrices which generalize some well-known results concerning the inverse of a tridiagonal Toeplitz matrix.http://www.sciencedirect.com/science/article/B6V0R-42KDHCJ-2/1 ...
Fonseca, C. M. da, Petronilho, J.
core
The eigenvalues of tridiagonal sign matrices are dense in the spectra of periodic tridiagonal sign operators [PDF]
, 2015 Chandler-Wilde, Chonchaiya and Lindner conjectured that the set of eigenvalues of finite tridiagonal sign matrices ($\pm 1$ on the first sub- and superdiagonal, $0$ everywhere else) is dense in the set of spectra of periodic tridiagonal sign operators on
Hagger, Raffael
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