Results 71 to 80 of about 2,183 (141)

On minimum algebraic connectivity of graphs whose complements are bicyclic

Open Mathematics, 2019
The second smallest eigenvalue of the Laplacian matrix of a graph (network) is called its algebraic connectivity which is used to diagnose Alzheimer’s disease, distinguish the group differences, measure the robustness, construct multiplex model ...
Liu Jia-Bao, Javaid Muhammad, Raza Mohsin, Saleem Naeem   +3 more
doaj   +1 more source

A convergence analysis of SOR iterative methods for linear systems with weak H-matrices

Open Mathematics, 2016
It is well known that SOR iterative methods are convergent for linear systems, whose coefficient matrices are strictly or irreducibly diagonally dominant matrices and strong H-matrices (whose comparison matrices are nonsingular M-matrices).
Zhang Cheng-yi, Xue Zichen, Luo Shuanghua   +2 more
doaj   +1 more source

Bound for the largest singular value of nonnegative rectangular tensors

Open Mathematics, 2016
In this paper, we give a new bound for the largest singular value of nonnegative rectangular tensors when m = n, which is tighter than the bound provided by Yang and Yang in “Singular values of nonnegative rectangular tensors”, Front. Math.
He Jun, Liu Yan-Min, Ke Hua, Tian Jun-Kang, Li Xiang   +4 more
doaj   +1 more source

Two new eigenvalue localization sets for tensors and theirs applications

Open Mathematics, 2017
A new eigenvalue localization set for tensors is given and proved to be tighter than those presented by Qi (J. Symbolic Comput., 2005, 40, 1302-1324) and Li et al. (Numer. Linear Algebra Appl., 2014, 21, 39-50).
Zhao Jianxing, Sang Caili
doaj   +1 more source

Potential counter-examples to a conjecture on the column space of the adjacency matrix

Special Matrices
Attempts to resolve the Akbari-Cameron-Khosrovshahi-conjecture have so far focused on the rank of a matrix. The conjecture claims that there exists a nonzero (0, 1)-vector in the row space of a (0, 1)-adjacency matrix A{\bf{A}} of a graph GG, that is not
Sciriha Irene, Kaur Bableen, Borg James L., Debono Mark   +3 more
doaj   +1 more source

Sombor spectra of chain graphs. [PDF]

Heliyon, 2023
Imran M, Rather BA.
europepmc   +1 more source

M-matrix and inverse M-matrix extensions

Special Matrices, 2020
A class of matrices that simultaneously generalizes the M-matrices and the inverse M-matrices is brought forward and its properties are reviewed. It is interesting to see how this class bridges the properties of the matrices it generalizes and provides a
McDonald J.J., Nandi R., Sivakumar K.C., Sushmitha P., Tsatsomeros M.J., Wendler Enzo, Wendler Megan   +6 more
doaj   +1 more source

Some stable and closed-shell structures of anticancer drugs by graph theoretical parameters. [PDF]

Heliyon, 2023
Koam ANA, Ahmad A, Azeem M, Hakami KH, Elahi K.   +4 more
europepmc   +1 more source

Explicit determinantal formula for a class of banded matrices

Open Mathematics, 2020
In this short note, we provide a brief proof for a recent determinantal formula involving a particular family of banded matrices.
Amanbek Yerlan, Du Zhibin, Erlangga Yogi, da Fonseca Carlos M., Kurmanbek Bakytzhan, Pereira António   +5 more
doaj   +1 more source

Convergence analysis of non-matching finite elements for a linear monotone additive Schwarz scheme for semi-linear elliptic problems

Nonlinear Engineering
In this article, we are interested in the standard finite element approximation method of linear additive Schwarz iterations for a class of semi-linear elliptic problems, for two subdomains, in the context of non-matching grids.
Al Farei Qais, Boulbrachene Messaoud
doaj   +1 more source