Results 101 to 110 of about 6,302 (292)
Pairs of positive solutions for resonant singular equations with the p-Laplacian
Electronic Journal of Differential Equations, 2017 We consider a nonlinear elliptic equation driven by the Dirichlet p-Laplacian with a singular term and a (p-1)-linear perturbation which is resonant at $+\infty$ with respect to the principal eigenvalue. Using variational tools, together with suitable
Nikolaos S. Papageorgiou +2 more
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Graph-theoretical approach to the eigenvalue spectrum of perturbed higher-order exceptional points
Physical Review ResearchExceptional points are special degeneracy points in parameter space that can arise in (effective) non-Hermitian Hamiltonians describing open quantum and wave systems.
Daniel Grom +3 more
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Another instructive example in eigenvalue perturbation theory [PDF]
, 1979 M. P. Fry
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Perturbation of unstable eigenvalues of finite multiplicity
Journal of Functional Analysis, 1976 AbstractWe investigate perturbations of the form H(z) + zV(z) and the behavior of isolated and embedded eigenvalues λ0 of finite multiplicity of H0 = H(0), assuming analytic continuability of certain factorized resolvents. Spectral concentration and conditions of instability are given in terms of virtual poles.
H. Baumgärtel, Michael Demuth
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Asian Journal of Control, EarlyView.Abstract This paper investigates the problem of observer‐based sliding mode control (SMC) of stochastic uncertain Markov jump systems using dual‐driven event‐triggered mechanism (ETM). The ETM is implemented not only in the system output to the observer channel but also in the feedback channel, forming a dual ETM, which can effectively reduce ...
Haocheng Lou +2 more
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Asian Journal of Control, EarlyView.Abstract This paper focuses on the issue of adaptive event‐triggered containment control for Markov jump multi‐agent systems characterized by hidden Markov jump parameters. The central objective is to design an output‐feedback controller for the Markov jump multi‐agent system by using an adaptive event‐triggered technique that not only ensures the ...
Parivallal Arumugam +3 more
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Subcritical perturbations of resonant linear problems with sign-changing potential
Electronic Journal of Differential Equations, 2005 We establish existence and multiplicity theorems for a Dirichlet boundary-value problem at resonance. This problem is a nonlinear subcritical perturbation of a linear eigenvalue problem studied by Cuesta, and includes a sign-changing potential. We obtain
Teodora-Liliana Dinu
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Perturbation nonlinearly dependent on the eigenvalue and a condensation of perturbation theory
Journal of Mathematical Analysis and Applications, 1969 where H,, is a self-adjoint operator with known spectral measure E. for the complex Hilbert space X and G, is given as a symmetric operator in X depending on h, and where by a solution pair u, h to (1.1) we mean that X is to be a real scalar and u is to be a nonnull X vector belonging to both the domain of H,, and of G, and (1.1) is to be satisfied by ...
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Asian Journal of Control, EarlyView.Abstract This paper tackles the problem of robust and accurate fixed‐time tracking in human–robot interaction and deals with uncertainties. This work introduces a control approach for a wearable exoskeleton designed specifically for rehabilitation tasks.
Mahmoud Abdallah +4 more
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Perturbation and interlace theorems for the unitary eigenvalue problem [PDF]
, 1993 L. Elsner, Chunyang He
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