Results 1 to 10 of about 2,100,417 (234)

Pentagon equation and matrix bialgebras [PDF]

open access: yesCommunications in Algebra, 2000
We classify coproducts on matrix algebra in terms of solutions to some modification of pentagon equation. The construction of Baaj and Skandalis describing finite dimensional unitary solutions of pentagon equation is extended to the non-unitary case.
Davydov, A.
core   +3 more sources

On matrix equivalence and matrix equations

open access: bronzeLinear Algebra and its Applications, 1979
AbstractRoth's theorem on the solvability of matrix equations of the form AX−YB=C is proved for matrices with coefficients from a division ring or a ring which is module-finite over its center.
William H. Gustafson, J. M. Zelmanowitz
openalex   +3 more sources

A New Solution to the Matrix Equation X−AX¯B=C [PDF]

open access: yesThe Scientific World Journal, 2014
We investigate the matrix equation X−AX¯B=C. For convenience, the matrix equation X−AX¯B=C is named as Kalman-Yakubovich-conjugate matrix equation. The explicit solution is constructed when the above matrix equation has unique solution. And this solution
Caiqin Song
doaj   +2 more sources

Matrix quadratic equations [PDF]

open access: bronzeBulletin of the Australian Mathematical Society, 1974
Matrix quadratic equations have found the most diverse applications. The present article gives a connected account of their theory, and contains some new results and new proofs of known results.
W. A. Coppel
openalex   +3 more sources

Convex matrix equations [PDF]

open access: bronzeBulletin of the American Mathematical Society, 1972
J. S. Montague, Robert J. Plemmons
openalex   +4 more sources

The common Re-nonnegative definite and Re-positive definite solutions to the matrix equations $ A_1XA_1^\ast = C_1 $ and $ A_2XA_2^\ast = C_2 $

open access: yesAIMS Mathematics, 2022
In this paper, we consider the common Re-nonnegative definite (Re-nnd) and Re-positive definite (Re-pd) solutions to a pair of linear matrix equations $ A_1XA_1^\ast = C_1, \ A_2XA_2^\ast = C_2 $ and present some necessary and sufficient conditions for ...
Yinlan Chen, Lina Liu
doaj   +1 more source

On spectral numerical method for variable-order partial differential equations

open access: yesAIMS Mathematics, 2022
In this research article, we develop a powerful algorithm for numerical solutions to variable-order partial differential equations (PDEs). For the said method, we utilize properties of shifted Legendre polynomials to establish some operational matrices ...
Kamal Shah   +3 more
doaj   +1 more source

Three special kinds of least squares solutions for the quaternion generalized Sylvester matrix equation

open access: yesAIMS Mathematics, 2022
In this paper, we propose an efficient method for some special solutions of the quaternion matrix equation AXB+CYD=E. By integrating real representation of a quaternion matrix with H-representation, we investigate the minimal norm least squares solution ...
Anli Wei   +3 more
doaj   +1 more source

Minimal Rank Properties of Outer Inverses with Prescribed Range and Null Space

open access: yesMathematics, 2023
The purpose of this paper is to investigate solvability of systems of constrained matrix equations in the form of constrained minimization problems.
Dijana Mosić   +2 more
doaj   +1 more source

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