Results 51 to 60 of about 2,643,042 (116)

Independence and orthogonality of algebraic eigenvectors over the max-plus algebra [PDF]

open access: yesarXiv, 2021
The max-plus algebra $\mathbb{R}\cup \{-\infty \}$ is a semiring with the two operations: addition $a \oplus b := \max(a,b)$ and multiplication $a \otimes b := a + b$. Roots of the characteristic polynomial of a max-plus matrix are called algebraic eigenvalues.
arxiv  

Algebraic Bethe ansatz for the Temperley–Lieb spin-1 chain

open access: yesNuclear Physics B, 2016
We use the algebraic Bethe ansatz to obtain the eigenvalues and eigenvectors of the spin-1 Temperley–Lieb open quantum chain with “free” boundary conditions.
Rafael I. Nepomechie, Rodrigo A. Pimenta
doaj   +1 more source

Generalization of the Analytical Exponential Model for Homogeneous Reactor Kinetics Equations

open access: yesJournal of Applied Mathematics, 2012
Mathematical form for two energy groups of three-dimensional homogeneous reactor kinetics equations and average one group of the precursor concentration of delayed neutrons is presented.
Abdallah A. Nahla, Mohammed F. Al-Ghamdi
doaj   +1 more source

Efficient Rigorous Coupled-Wave Analysis Without Solving Eigenvalues for Analyzing One-Dimensional Ultrathin Periodic Structures

open access: yesIEEE Access, 2020
Based on the first-order Taylor expansion, an efficient Rigorous Coupled-Wave Analysis (RCWA) for one-dimensional ultrathin periodic structures is proposed in this paper.
Jie Li   +8 more
doaj   +1 more source

A homotopy method for finding eigenvalues and eigenvectors [PDF]

open access: yesarXiv, 2007
Suppose we want to find the eigenvalues and eigenvectors for the linear operator L, and suppose that we have solved this problem for some other "nearby" operator K. In this paper we show how to represent the eigenvalues and eigenvectors of L in terms of the corresponding properties of K.
arxiv  

High dimensional normality of noisy eigenvectors [PDF]

open access: yesarXiv, 2020
We study joint eigenvector distributions for large symmetric matrices in the presence of weak noise. Our main result asserts that every submatrix in the orthogonal matrix of eigenvectors converges to a multidimensional Gaussian distribution. The proof involves analyzing the stochastic eigenstate equation (SEE) which describes the Lie group valued flow ...
arxiv  

Partial eigenvalue assignment problem of linear control systems using orthogonality relations [PDF]

open access: yesActa Montanistica Slovaca, 2006
The partial eigenvalue assignment is the problem of reassigning a part of the open-loop spectrum of a linear system by a feedback control, leaving the rest of the spectrum invariant.
Mohamed A. Ramadan, Ehab A. El - Sayed
doaj  

The eigenvectors of the right-justified Pascal triangle [PDF]

open access: yesarXiv, 2000
We find the eigenvalues and eigenvectors of the n by n matrix with (i,j) entry \binom(i-1,n-j), establishing a conjecture of Peele and Stanica. Curiously, the eigenvectors can be chosen to form a matrix which is its own inverse.
arxiv  

Spectra of chains connected to complete graphs [PDF]

open access: yesarXiv, 2020
We characterize the spectrum of the Laplacian of graphs composed of one or two finite or infinite chains connected to a complete graph. We show the existence of localized eigenvectors of two types, eigenvectors that vanish exactly outside the complete graph and eigenvectors that decrease exponentially outside the complete graph.
arxiv  

Complex modal analysis of structural vibration and acoustic radiation of plates

open access: yesJournal of Low Frequency Noise, Vibration and Active Control
Inhomogeneous damping distribution leads to the occurrence of complex modes of structures. Complex modes' vibration and acoustic radiation characteristics are different from real modes.
Lai Wei, Sheng Li
doaj   +1 more source

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