Results 31 to 40 of about 2,188,246 (287)

Kronecker product of matrices and solutions of Sylvestertype matrix polynomial equations

open access: yesМатематичні Студії
We investigate the solutions of the Sylvester-type matrix polynomial equation $$A(\lambda)X(\lambda)+Y(\lambda)B(\lambda)=C(\lambda),$$ where\ $A(\lambda),$ \ $ B(\lambda),$\ and \ $C(\lambda)$ are the polynomial matrices with elements in a ring of ...
N. S. Dzhaliuk, V. M. Petrychkovych
doaj   +1 more source

Matrix Inequality for the Laplace Equation

open access: yes, 2017
Since Li and Yau obtained the gradient estimate for the heat equation, related estimates have been extensively studied. With additional curvature assumptions, matrix estimates that generalize such estimates have been discovered for various time-dependent
Park, Jiewon
core   +1 more source

Field Equations of Massless Fields in the New Interpretation of the Matrix Model [PDF]

open access: yes, 2006
Recently, some of the authors have introduced a new interpretation of matrix models in which covariant derivatives on any curved space can be expressed by large-N matrices.
Aoyama   +19 more
core   +3 more sources

Novel Bäcklund Transformations for Integrable Equations

open access: yesMathematics, 2022
In this paper, we construct a new matrix partial differential equation having a structure and properties which mirror those of a matrix fourth Painlevé equation recently derived by the current authors.
Pilar Ruiz Gordoa, Andrew Pickering
doaj   +1 more source

A new extended matrix KP hierarchy and its solutions

open access: yes, 2010
With the square eigenfunctions symmetry constraint, we introduce a new extended matrix KP hierarchy and its Lax representation from the matrix KP hierarchy by adding a new $\tau_B$ flow.
A. I. Zenchuk   +20 more
core   +1 more source

Variational solution of the T-matrix integral equation [PDF]

open access: yes, 2005
We present a variational solution of the T-matrix integral equation within a local approximation. This solution provides a simple form for the T matrix similar to Hubbard models but with the local interaction depending on momentum and frequency.
A. L. Fetter   +10 more
core   +2 more sources

Matrix equation representation of the convolution equation and its unique solvability

open access: yesSpecial Matrices
We consider the convolution equation F*X=BF* X=B, where F∈R3×3F\in {{\mathbb{R}}}^{3\times 3} and B∈Rm×nB\in {{\mathbb{R}}}^{m\times n} are given and X∈Rm×nX\in {{\mathbb{R}}}^{m\times n} is to be determined. The convolution equation can be regarded as a
Satake Yuki   +3 more
doaj   +1 more source

Solution to Several Split Quaternion Matrix Equations

open access: yesMathematics
Split quaternions have various applications in mathematics, computer graphics, robotics, physics, and so on. In this paper, two useful, real representations of a split quaternion matrix are proposed. Based on this, we derive their fundamental properties.
Xin Liu, Tong Shi, Yang Zhang
doaj   +1 more source

Exact solutions to the modified Korteweg-de Vries equation

open access: yes, 2010
A formula for certain exact solutions to the modified Korteweg-de Vries (mKdV) equation is obtained via the inverse scattering transform method. The kernel of the relevant Marchenko integral equation is written with the help of matrix exponentials as ...
Demontis, Francesco
core   +1 more source

Matrix Theory Description of Schwarzschild Black Holes in the Regime N >> S [PDF]

open access: yes, 1998
We study the description of Schwarzschild black holes, of entropy S, within matrix theory in the regime $N \ge S \gg 1$. We obtain the most general matrix theory equation of state by requiring that black holes admit a description within this theory.
A. A. Bytsenko   +30 more
core   +3 more sources

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