Results 11 to 20 of about 238,178 (293)
Cosmological perturbations and the Weinberg theorem
Journal of Cosmology and Astroparticle Physics, 2015 26 pages, no ...
Akhshik, Mohammad +2 more
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Feynman–Hellmann theorem for resonances and the quest for QCD exotica [PDF]
European Physical Journal C: Particles and Fields, 2017 The generalization of the Feynman–Hellmann theorem for resonance states in quantum field theory is derived. On the basis of this theorem, a criterion is proposed to study the possible exotic nature of certain hadronic states emerging in QCD.
J. Ruiz de Elvira +3 more
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Generic perturbations of linear integrable Hamiltonian systems [PDF]
, 2015 In this paper, we investigate perturbations of linear integrable Hamiltonian systems, with the aim of establishing results in the spirit of the KAM theorem (preservation of invariant tori), the Nekhoroshev theorem (stability of the action variables for a
A. Bounemoura +26 more
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Generators of Analytic Resolving Families for Distributed Order Equations and Perturbations
Mathematics, 2020 Linear differential equations of a distributed order with an unbounded operator in a Banach space are studied in this paper. A theorem on the generation of analytic resolving families of operators for such equations is proved.
Vladimir E. Fedorov
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An Augmented Lagrangian Algorithm for Solving Semiinfinite Programming
Journal of Applied Mathematics, 2012 We present a smooth augmented Lagrangian algorithm for semiinfinite programming (SIP). For this algorithm, we establish a perturbation theorem under mild conditions.
Qian Liu, Changyu Wang
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A perturbed ergodic theorem [PDF]
Proceedings of the American Mathematical Society, 1999 Using a version of an ergodic lemma due to Cuculescu and Foiaş, we prove a pointwise ergodic theorem for L 1 L^1 -contractions which can be viewed as a perturbed version of the celebrated ergodic theorem of Chacon and Ornstein.
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A Kam Theorem for Space-Multidimensional Hamiltonian PDE [PDF]
, 2016 We present an abstract KAM theorem, adapted to space-multidimensional hamiltonian PDEs with smoothing non-linearities. The main novelties of this theorem are that: $\bullet$ the integrable part of the hamiltonian may contain a hyperbolic part and as a ...
Eliasson, L Hakan +2 more
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Singular boundary value problem on infinite time scale
Discrete Dynamics in Nature and Society, 2006 This paper deals with a class of singular boundary value problems of differential equations on infinite time scale. An existence theorem of positive solutions is established by using the Schauder fixed point theorem and perturbation and operator ...
Zhao-Cai Hao, Jin Liang, Ti-Jun Xiao
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Existence of Generalized Homoclinic Solutions of Lotka-Volterra System under a Small Perturbation
Journal of Function Spaces, 2016 This paper investigates Lotka-Volterra system under a small perturbation vxx=-μ(1-a2u-v)v+ϵf(ϵ,v,vx,u,ux), uxx=-(1-u-a1v)u+ϵg(ϵ,v,vx,u,ux). By the Fourier series expansion technique method, the fixed point theorem, the perturbation theorem, and the ...
Yuzhen Mi
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Markovian perturbation, response and fluctuation dissipation theorem [PDF]
, 2010 We consider the Fluctuation Dissipation Theorem (FDT) of statistical physics from a mathematical perspective. We formalize the concept of "linear response function" in the general framework of Markov processes.
Dembo, Amir, Deuschel, Jean-Dominique
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