Results 141 to 150 of about 3,534,092 (344)

On Path Laplacian Eigenvalues and Path Laplacian Energy of Graphs

Journal of New Theory, 2018
We introduce the concept of Path Laplacian Matrix for a graph and explore the eigenvalues of this matrix. The eigenvalues of this matrix are called the path Laplacian eigenvalues of the graph.
Shridhar Chandrakant Patekar, Maruti Mukinda Shikare   +1 more
doaj  

Iterative Methods to Solve the Generalized Coupled Sylvester-Conjugate Matrix Equations for Obtaining the Centrally Symmetric (Centrally Antisymmetric) Matrix Solutions

Journal of Applied Mathematics, 2014
The iterative method is presented for obtaining the centrally symmetric (centrally antisymmetric) matrix pair (X,Y) solutions of the generalized coupled Sylvester-conjugate matrix equations A1X+B1Y=D1X¯E1+F1, A2Y+B2X=D2Y¯E2+F2.
Yajun Xie, Changfeng Ma
doaj   +1 more source

A theorem on the automorphs of a skew-symmetric matrix. [PDF]

, 1965
Morris Newman
openalex   +1 more source

Inter‐Layer Diffusion of Excitations in 2D Perovskites Revealed by Photoluminescence Reabsorption

Advanced Functional Materials, EarlyView.
Inter‐layer diffusion of photoexcitations is monitored in thin films of the 2D perovskite (PEA)2PbI4 by tracking time‐dependent changes in photoluminescence spectra induced by photon reabsorption effects. A low out‐of‐plane excitation diffusion coefficient of 0.26 × 10−4 cm2 s−1 is determined through 1D diffusion modeling.
Jiaxing Du, Marcello Righetto, Manuel Kober‐Czerny, Siyu Yan, Karim A. Elmestekawy, Henry J. Snaith, Michael B. Johnston, Laura M. Herz   +7 more
wiley   +1 more source

Algorithm 325:Adjustment of the inverse of a symmetric matrix when two symmetric elements are changed [PDF]

, 1968
Gerhard Zielke
openalex   +1 more source

On the symmetric solutions of linear matrix equations

Linear Algebra and its Applications, 1990
AbstractThe symmetric solutions of linear matrix equations AX = C and AXB = C are considered. The necessary and sufficient conditions for the consistency of the equations with a symmetric condition on solutions are derived using the singular-value decomposition and the generalized singular-value decomposition.
openaire   +2 more sources

Elucidating Sodium Ion Storage Mechanisms in Hard Carbon Anodes at the Electronic Level

Advanced Functional Materials, EarlyView.
High‐resolution, multi‐frequency continuous wave, and pulsed Electron Paramagnetic Resonance (EPR) spectroscopy uncover the intricate Na ion storage mechanisms in hard carbon. This study reveals the coexistence of Na ion intercalation and solvent co‐intercalation, alongside a subsequent transition of Na ions from ionic to quasi‐metallic to metallic ...
Qingbing Xia, Cheng‐Lin Ko, Emily R. Cooper, Qinfen Gu, Ruth Knibbe, Jeffrey R. Harmer   +5 more
wiley   +1 more source

Symmetric separation of variables for trigonometric integrable models

Nuclear Physics B, 2020
We study a problem of variable separation for the classical integrable hamiltonian systems possessing Lax matrices satisfying linear r-matrix algebra with skew-symmetric sl(2)⊗sl(2)-valued trigonometric r-matrix.
T. Skrypnyk
doaj  

Conditions of general Z2 symmetry and TM1,2 mixing for the minimal type-I seesaw mechanism in an arbitrary basis

Nuclear Physics B, 2022
In this paper, using a formula for the minimal type-I seesaw mechanism by LDLT (or generalized Cholesky) decomposition, conditions of general Z2-invariance for the neutrino mass matrix m are obtained in an arbitrary basis. The conditions are found to be (
Masaki J.S. Yang
doaj  

The Moments of Elementary Symmetric Functions of the Roots of a Matrix in Multivariate Analysis [PDF]

, 1961
Tito A. Mijares
openalex   +1 more source