Results 31 to 40 of about 251,319 (312)

On the second minimizing graph in the set of complements of trees

open access: yesAKCE International Journal of Graphs and Combinatorics, 2019
Let G be a graph of order n and A(G)=[ai,j]be its adjacency matrix such that ai,j=1 if viis adjacent to vjand ai,j=0 otherwise, where 1≤i,j≤n. In a certain family of graphs, a graph is called minimizing (or second minimizing) if the least eigenvalue of ...
M. Javaid
doaj   +2 more sources

An eigenvalue localization set for tensors and its applications

open access: yesJournal of Inequalities and Applications, 2017
A new eigenvalue localization set for tensors is given and proved to be tighter than those presented by Li et al. (Linear Algebra Appl. 481:36-53, 2015) and Huang et al. (J. Inequal. Appl. 2016:254, 2016).
Jianxing Zhao, Caili Sang
doaj   +1 more source

The decay of Hopf solitons in the Skyrme model [PDF]

open access: yes, 2016
It is understood that the Skyrme model has a topologically interesting baryonic excitation which can model nuclei. So far no stable knotted solutions, of the Skyrme model, have been found. Here we investigate the dynamics of Hopf solitons decaying to the
Foster, David
core   +3 more sources

Generalized detector as a spectrum sensor in cognitive radio networks [PDF]

open access: yes, 2015
The implementation of the generalized detector (GD) in cognitive radio (CR) systems allows us to improve the spectrum sensing performance in comparison with employment of the conventional detectors.
Shbat, M.S., Tuzlukov, V.P.
core   +2 more sources

Strong "quantum" chaos in the global ballooning mode spectrum of three-dimensional plasmas [PDF]

open access: yes, 2015
The spectrum of ideal magnetohydrodynamic (MHD) pressure-driven (ballooning) modes in strongly nonaxisymmetric toroidal systems is difficult to analyze numerically owing to the singular nature of ideal MHD caused by lack of an inherent scale length.
Ball, Rowena, Cuthbert, P, Dewar, Robert
core   +1 more source

Inflation with a graceful exit in a random landscape [PDF]

open access: yes, 2016
We develop a stochastic description of small-field inflationary histories with a graceful exit in a random potential whose Hessian is a Gaussian random matrix as a model of the unstructured part of the string landscape.
Pedro, Francisco G., Westphal, Alexander
core   +3 more sources

HUBO formulations for solving the eigenvalue problem

open access: yesResults in Control and Optimization, 2023
Solving the eigenvalue problem is particularly important in almost all fields of science and engineering. With the development of quantum computers, multiple algorithms have been proposed for this purpose.
Kyungtaek Jun, Hyunju Lee
doaj   +1 more source

Bounds on the Minimum Edge Dominating Energy in Terms of Some Parameters of a Graph [PDF]

open access: yesMathematics Interdisciplinary Research, 2023
‎The minimum edge dominating energy‎, ‎denoted by $EE_{F}(G)$‎, ‎is the sum of the absolute values of eigenvalues of the minimum edge dominating matrix of graph $G$‎.
Fateme Movahedi
doaj   +1 more source

Cooperative Spectrum Sensing Algorithm Based on Double Eigenvalue Limiting Distribution

open access: yesDianxin kexue, 2014
A spectrum sensing algorithm using double eigenvalue limiting(DEL)distributions was presented. The difference between the maximum and the minimum eigenvalue was exploited as the test statistic.
Zhijin zhao, Weikang Hu, Haiquan Wang
doaj   +2 more sources

Some Bounds on Eigenvalues of the Hadamard Product and the Fan Product of Matrices

open access: yesMathematics, 2019
In this paper, an upper bound on the spectral radius ρ ( A ∘ B ) for the Hadamard product of two nonnegative matrices (A and B) and the minimum eigenvalue τ ( C ★ D ) of the Fan product of two M-matrices (C and D) are researched.
Qianping Guo   +3 more
doaj   +1 more source

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