Results 51 to 60 of about 249,692 (322)

Laplacian Controllability and Observability of Multi-Agent Systems: Recent Advances in Tree Graphs

open access: yesAlgorithms
Laplacian controllability and observability of a consensus network is a widely considered topic in the area of multi-agent systems, complex networks, and large-scale systems.
Gianfranco Parlangeli
doaj   +1 more source

Formulation for an Ogden-type hyperelastic analysis with hyper dual numbers and its performance evaluation

open access: yesNihon Kikai Gakkai ronbunshu, 2019
A numerical calculation scheme for stress and its consistent tangent moduli with hyper-dual numbers(HDN) for Ogden-type hyperelastic material model was proposed.
Masaki FUJIKAWA   +5 more
doaj   +1 more source

Practical Assessment of Quartz Crystallographic Preferred Orientation Strength

open access: yesTektonika, 2023
The ordering strength of crystallographic preferred orientation data can be assessed in different ways, however, the appropriateness of the methodology used to do so can depend on the geometry of the distributions.
Kyle Larson   +3 more
doaj   +1 more source

Kramers degeneracy without eigenvectors

open access: yes, 2012
Wigner gave a well-known proof of Kramers degeneracy, for time reversal invariant systems containing an odd number of half-integer spin particles. But Wigner's proof relies on the assumption that the Hamiltonian has an eigenvector, and thus does not ...
Roberts, Bryan W.
core   +1 more source

Eigenvectors of Permutation Matrices

open access: yesAdvances in Pure Mathematics, 2015
The spectral properties of special matrices have been widely studied, because of their applications. We focus on permutation matrices over a finite field and, more concretely, we compute the minimal annihilating polynomial, and a set of linearly independent eigenvectors from the decomposition in disjoint cycles of the permutation ...
García Planas, María Isabel   +1 more
openaire   +4 more sources

Observation of Dislocation Bound States and Skin Effects in Non‐Hermitian Chern Insulators

open access: yesAdvanced Materials, EarlyView.
Experimental observation of the dislocation‐induced bound states and skin effects is demonstrated in a line‐gap non‐Hermitian acoustic lattice. By utilizing active meta‐atoms to measure the full complex spectrum and biorthogonal eigenstates, the study reveals the exceptional‐point‐driven melting of defect modes.
Jia‐Xin Zhong, Bitan Roy, Yun Jing
wiley   +1 more source

A note on the eigensystem of the covariance matrix of dichotomous Guttman items

open access: yesFrontiers in Psychology, 2015
We consider the sample covariance matrix for dichotomous Guttman items under a set of uniformity conditions, and obtain closed-form expressions for the eigenvalues and eigenvectors of the matrix.
Clintin P Davis-Stober   +2 more
doaj   +1 more source

Twisting singular solutions of Bethe's equations

open access: yes, 2014
The Bethe equations for the periodic XXX and XXZ spin chains admit singular solutions, for which the corresponding eigenvalues and eigenvectors are ill-defined. We use a twist regularization to derive conditions for such singular solutions to be physical,
Nepomechie, Rafael I., Wang, Chunguang
core   +1 more source

Photonics of Topological Magnetic Textures

open access: yesAdvanced Optical Materials, EarlyView.
Localized noncollinear magetic textures imprint their geometry and topology onto traversing photonic fields endowing them with orbital angular‐momentum, chirality, and magnetoelectric densities. Abstract Topological textures in magnetically ordered materials are an important case studies for fundamental research with promising applications in data ...
Vakhtang Jandieri   +6 more
wiley   +1 more source

A Modified Inverse Iteration Method for Computing the Symmetric Tridiagonal Eigenvectors

open access: yesMathematics, 2022
This paper presents a novel method for computing the symmetric tridiagonal eigenvectors, which is the modification of the widely used Inverse Iteration method.
Wei Chu, Yao Zhao, Hua Yuan
doaj   +1 more source

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