Results 81 to 90 of about 238,932 (290)

Perturbed Keplerian Hamiltonian Systems

open access: yesInternational Journal of Differential Equations, 2023
This paper deals with a class of perturbation planar Keplerian Hamiltonian systems, by exploiting the nondegeneracy properties of the circular solutions of the planar Keplerian Hamiltonian systems, and by applying the implicit function theorem, we show ...
Riadh Chteoui
doaj   +1 more source

Quasi-T\"oplitz functions in KAM theorem

open access: yes, 2013
We define and describe the class of Quasi-T\"oplitz functions. We then prove an abstract KAM theorem where the perturbation is in this class. We apply this theorem to a Non-Linear-Scr\"odinger equation on the torus $T^d$, thus proving existence and ...
Berti M.   +4 more
core   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

open access: yesAdvanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Notes on the Hypercyclic Operator

open access: yesJournal of Mathematical Extension, 2008
In this paper by using a nice criterion, we show that the perturbation of identity operators by some multiples of the standard backward shift is hypercyclic. This gives a new proof for Salas Theorem in ( [10 ], Theorem 3.3).
H. Rezaei
doaj  

Existence and multiplicity of solutions for a class of ( p , q ) $(p,q)$ -Kirchhoff system with combined nonlinearities on graphs

open access: yesBoundary Value Problems
By using the well-known mountain-pass theorem and Ekeland’s variational principle, we prove that there exist at least two fully nontrivial solutions for a ( p , q ) $(p,q)$ -Kirchhoff elliptic system with the Dirichlet boundary conditions and ...
Zhangyi Yu, Junping Xie, Xingyong Zhang
doaj   +1 more source

Analysis of Thurstone-Motivated Models in the Case of Non-Evaluable Data: Methods for Extracting Information

open access: yesMathematics
We study Thurstone-motivated paired comparison models from the perspective of data evaluability, focusing on cases where datasets cannot be directly evaluated. Despite this limitation, such datasets may still contain extractable information.
Bence Kovács   +2 more
doaj   +1 more source

Anisotropic singular logistic equations [PDF]

open access: yesOpuscula Mathematica
We consider a parametric Dirichlet problem driven by the anisotropic \((p,q)\)-Laplacian and a reaction with a singular term and a superdiffusive logistic perturbation.
João Pablo Pinheiro Da Silva   +3 more
doaj   +1 more source

An Approximation Theorem and Generic Convergence of Solutions of Inverse Quasivariational Inequality Problems

open access: yesJournal of Function Spaces, 2022
In this paper, we mainly obtain an approximation theorem and generic convergence of solutions for inverse quasivariational inequality problems. First, we define the concept of the approximate solution to inverse quasivariational inequality problems under
Ting Liu, Wensheng Jia
doaj   +1 more source

KAM theory in configuration space and cancellations in the Lindstedt series

open access: yes, 2009
The KAM theorem for analytic quasi-integrable anisochronous Hamiltonian systems yields that the perturbation expansion (Lindstedt series) for quasi-periodic solutions with Diophantine frequency vector converges.
Corsi, Livia   +2 more
core   +1 more source

Pricing Dynamics in the US Hemp Market: A Vertical Price Transmission Analysis of the Hemp Value Chain

open access: yesAgribusiness, EarlyView.
ABSTRACT The US hemp market is a new and nascent industry that has been devoid of research for about half a century. This study examined the effects of exogenous shock on price at each phase of the value chain—Farm (hemp biomass), and its impact on prices at other phases of the value chain—Intermediary Processor (crude cannabidiol hemp) and Final ...
Solomon Odiase   +2 more
wiley   +1 more source

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