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Estrada Index and Laplacian Estrada Index of Random Interdependent Graphs

open access: yesMathematics, 2020
Let G be a simple graph of order n. The Estrada index and Laplacian Estrada index of G are defined by E E ( G ) = ∑ i = 1 n e λ i ( A ( G ) ) and L E E ( G ) = ∑ i = 1 n e λ i ( L ( G ) ) , where { λ i
Yilun Shang
doaj   +1 more source

Perturbation in eigenvalues

open access: yesLinear Algebra and its Applications, 1982
AbstractWe study the dependence of the eigenvalues of a tridiagonal matrix upon off-diagonal entries. The change in the eigenvalues when a cross-diagonal product approaches zero or infinity is estimated.
William W. Hager, Roger N. Pederson
openaire   +3 more sources

Sturm's Theorem for Min matrices

open access: yesAIMS Mathematics, 2023
In the present paper, we study Min matrix $ \mathcal{A}_{min} = \left[a_{min\left(i, j\right)}\right]_{i, j = 1}^n $, where $ a_s $'s are the elements of a real sequence $ \left\lbrace a_s\right\rbrace $.
Efruz Özlem Mersin
doaj   +1 more source

Greedy algorithms for high-dimensional eigenvalue problems [PDF]

open access: yes, 2013
In this article, we present two new greedy algorithms for the computation of the lowest eigenvalue (and an associated eigenvector) of a high-dimensional eigenvalue problem, and prove some convergence results for these algorithms and their orthogonalized ...
Cancès, Eric   +2 more
core   +4 more sources

Revisiting the ABC flow dynamo [PDF]

open access: yes, 2012
The ABC flow is a prototype for fast dynamo action, essential to the origin of magnetic field in large astrophysical objects. Probably the most studied configuration is the classical 1:1:1 flow.
Arnol'd V.   +7 more
core   +2 more sources

Fractional eigenvalues [PDF]

open access: yesCalculus of Variations and Partial Differential Equations, 2013
We study a non-local eigenvalue problem related to the fractional Sobolev spaces for large values of p and derive the limit equation as p goes to infinity. Its viscosity solutions have many interesting properties and the eigenvalues exhibit a strange behaviour.
Lindgren, Erik, Lindqvist, Peter
openaire   +2 more sources

Speed Controlof Induction Motor with Its Parameter Different from Nominal Value [PDF]

open access: yesWarasan Witthayasat Lae Theknoloyi Mahawitthayalai Mahasarakham, 2019
This paper compares the performance of speed responsesgiven by the direct vector control system of an induction motor. The four PI controllers are incorporated in such a control system with eight state-variables.
Wirote Sangtungtong
doaj  

Rayleigh quotient with bolzano booster for faster convergence of dominant eigenvalues

open access: yesIJAIN (International Journal of Advances in Intelligent Informatics), 2022
Computation ranking algorithms are widely used in several informatics fields. One of them is the PageRank algorithm, recognized as the most popular search engine globally.
M Zainal Arifin   +3 more
doaj   +1 more source

Optimal Controller and Filter Realisations using Finite-precision, Floating- point Arithmetic. [PDF]

open access: yes, 2005
The problem of reducing the fragility of digital controllers and filters implemented using finite-precision, floating-point arithmetic is considered.
Chen, Sheng   +3 more
core   +1 more source

Structured Distance to Normality of Dirichlet–Neumann Tridiagonal Toeplitz Matrices

open access: yesAxioms
This paper conducts a rigorous study on the spectral properties and operator-space distances of perturbed Dirichlet–Neumann tridiagonal (PDNT) Toeplitz matrices, with emphasis on their asymptotic behaviors. We establish explicit closed-form solutions for
Zhaolin Jiang   +3 more
doaj   +1 more source

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