Results 31 to 40 of about 2,710,086 (272)

Upper and Lower Bounds for the Spectral Radius of Generalized Reciprocal Distance Matrix of a Graph

Mathematics, 2022
For a connected graph G on n vertices, recall that the reciprocal distance signless Laplacian matrix of G is defined to be RQ(G)=RT(G)+RD(G), where RD(G) is the reciprocal distance matrix, RT(G)=diag(RT1,RT2,⋯,RTn) and RTi is the reciprocal distance ...
Yuzheng Ma, Yubin Gao, Yanling Shao
doaj   +1 more source

Distance spectral radius of trees with fixed maximum degree [PDF]

, 2010
Distance energy is a newly introduced molecular graph-based analog of the total π-electron energy, and it is defined as the sum of the absolute eigenvalues of the molecular distance matrix.
Stevanovic, Dragan, Ilic, Aleksandar
core   +1 more source

Experimental realization of a Fresnel hologram as a super spectral resolution optical element

Scientific Reports, 2021
A highly dispersive, diffractive optical element is designed and realized for an extremely high spectral resolution spectroscopy for exoplanet telescope application.
Mei-Li Hsieh, Thomas D. Ditto, Yi-Wen Lee, Shiuan-Huei Lin, Heidi J. Newberg, Shawn-Yu Lin   +5 more
doaj   +1 more source

On the distance energy of k-uniform hypergraphs

Special Matrices, 2023
In this article, we extend the concept of distance energy for hypergraphs. We first establish a relation between the distance energy and the distance spectral radius.
Sharma Kshitij, Panda Swarup Kumar
doaj   +1 more source

On distance spectral radius of graphs

Linear Algebra and its Applications, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wang, Yanna, Zhou, Bo
openaire   +1 more source

On the Second-Largest Reciprocal Distance Signless Laplacian Eigenvalue

Mathematics, 2021
The signless Laplacian reciprocal distance matrix for a simple connected graph G is defined as RQ(G)=diag(RH(G))+RD(G). Here, RD(G) is the Harary matrix (also called reciprocal distance matrix) while diag(RH(G)) represents the diagonal matrix of the ...
Maryam Baghipur, Modjtaba Ghorbani, Hilal A. Ganie, Yilun Shang   +3 more
doaj   +1 more source

A sharp upper bound for the spectral radius of a nonnegative matrix and applications [PDF]

, 2016
summary:We obtain a sharp upper bound for the spectral radius of a nonnegative matrix. This result is used to present upper bounds for the adjacency spectral radius, the Laplacian spectral radius, the signless Laplacian spectral radius, the distance ...
Shu, Yujie, Zhang, Xiao-Dong, You, Lihua
core   +1 more source

Influence of Source Parameters and Non-Kolmogorov Turbulence on Evolution Properties of Radial Phased-Locked Partially Coherent Vortex Beam Array

Photonics, 2021
Partially coherent optical vortices have been applicated widely to reduce the influence of atmospheric turbulence, especially for free-space optical (FSO) communication.
Jiao Wang, Mingjun Wang, Sichen Lei, Zhenkun Tan, Chenbai Wang, Yuanfei Wang   +5 more
doaj   +1 more source

k路覆盖图的新充分条件(New sufficient conditions on k -path-coverable graphs)

Zhejiang Daxue xuebao. Lixue ban, 2019
Let G be a simple connected graph of order n. A graph G is k-path-coverable if its vertex set V ( G ) can be covered by kor fewer vertex-disjoint paths. In this paper, we give some new sufficient conditions for a graph to be k-path-coverable in terms of ...
JIAHuicai(贾会才)
doaj   +1 more source

Inequalities for the Norm and Numerical Radius of Composite Operators in Hilbert Spaces [PDF]

, 2005
Some new inequalities for the norm and the numerical radius of composite operators generated by a pair of operators are ...
Dragomir, Sever S
core   +6 more sources