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In this paper we give a smooth linearization theorem for nonautonomous difference equations with a nonuniform strong exponential dichotomy. The linear part of such a nonautonomous difference equation is defined by a sequence of invertible…

Dynamical Systems · Mathematics 2019-07-09 Davor Dragicevic , Weinian Zhang , Wenmeng Zhang

Existence and spatio-temporal symmetric patterns of periodic solutions to second order reversible equivariant non-autonomous periodic systems with multiple delays are studied under the Hartman-Nagumo growth conditions. The method is based…

Dynamical Systems · Mathematics 2020-06-01 Zalman Balanov , Wieslaw Krawcewicz , Norimichi Hirano , Xiaoli Ye

The paper develops and studies a very general notion of dichotomy, referred to as "nonuniform $(h,k,\mu,\nu)$-dichotomy". The new notion contains as special cases most versions of dichotomy existing in the literature. The paper then…

Dynamical Systems · Mathematics 2015-04-21 Jimin Zhang , Meng Fan , Liu Yang

The first purpose of this work is to provide a friendly introduction to the theory of nonautonomous linear systems of ordinary differential equations, the property of exponential dichotomy and its corresponding spectral theory. The second…

Classical Analysis and ODEs · Mathematics 2026-01-21 Álvaro Castañeda , Gonzalo Robledo

The robustness property of exponential dichotomies refers to the stability of this notion under small linear perturbations. In recent work~\cite{PPX}, the authors have identified a new class of perturbations under which the notion of a…

Dynamical Systems · Mathematics 2025-12-16 Davor Dragicevic

The extended Hamilton's Principle and other methods proposed to handle non-holonomic constraints are considered. They dont agree with each other. By looking at its consistency with D'Alembert's principle for linear non-holonomic…

Classical Physics · Physics 2014-06-13 H. M. Bharath

We investigate evolution families generated by general linear first-order hyperbolic systems in one space dimension with periodic boundary conditions. We state explicit conditions on the coefficient functions that are sufficient for the…

Analysis of PDEs · Mathematics 2025-12-10 R. Klyuchnyk , I. Kmit , L. Recke

The Lambek calculus can be considered as a version of non-commutative intuitionistic linear logic. One of the interesting features of the Lambek calculus is the so-called "Lambek's restriction," that is, the antecedent of any provable…

Logic · Mathematics 2019-05-10 Max Kanovich , Stepan Kuznetsov , Andre Scedrov

Hein and Pr\"{u}ss [J. Differential Equations, 261(2016)4709-4727] presented a version of Hartman-Grobman type $C^{0}$ linearization result for semilinear hyperbolic evolution equations. They showed that the linearising map (homomorphism)…

Classical Analysis and ODEs · Mathematics 2022-02-01 Weijie Lu , Manuel Pinto , Y. H Xia

The concept of extended Hamiltonian systems allows the geometrical interpretation of several integrable and superintegrable systems with polynomial first integrals of degree depending on a rational parameter. Until now, the procedure of…

Mathematical Physics · Physics 2020-10-28 Claudia Maria Chanu , Giovanni Rastelli

In this paper, we prove the partial linearization for n-dimensional nonautonomous differential equations. The conditions are formulated in terms of the dichotomy spectrum.

Dynamical Systems · Mathematics 2016-03-18 Xia Pan , Zuohuan Zheng

In this paper we study Chaplygin's Reducibility Theorem and extend its applicability to nonholonomic systems with symmetry described by the Hamilton-Poincare-d'Alembert equations in arbitrary degrees of freedom. As special cases we extract…

Mathematical Physics · Physics 2011-10-03 O. E. Fernandez , T. Mestdag , A. M. Bloch

After defining non-Gaussian L\'evy processes for two-sided time, stochastic differential equations with such L\'evy processes are considered. Solution paths for these stochastic differential equations have countable jump discontinuities in…

Probability · Mathematics 2012-10-03 Huijie Qiao , Jinqiao Duan

In the preceding Comment [1] it was claimed that the third-order Hamiltonian obtained in our original paper [2] is not Hermitian for general situations when considering time-dependence and the way of deriving the effective third-order…

Quantum Physics · Physics 2024-02-21 Wenjun Shao , Chunfeng Wu , Xun-Li Feng

Takens Theorem for a partially hyperbolic dynamics provides a normal linearization along the center manifold. In this paper, we give the nonautonomous version of Takens Theorem under non-resonance conditions formulated in terms of the…

Dynamical Systems · Mathematics 2024-09-24 Davor Dragičević , Xiao Tang , Wenmeng Zhang

We establish a new perturbation theory for orthogonal polynomials using a Riemann--Hilbert approach and consider applications in numerical linear algebra and random matrix theory. This new approach shows that the orthogonal polynomials with…

Probability · Mathematics 2022-09-23 Xiucai Ding , Thomas Trogdon

In this paper we give a smooth linearization theorem for nonautonomous differential equations with a nonuniform strong exponential dichotomy. In terms of discretized evolution operator with hyperbolic fixed point 0, we formulate its…

Dynamical Systems · Mathematics 2019-12-11 Davor Dragicevic , Weinian Zhang , Wenmeng Zhang

In this article, we complete the study of the equivalences between the properties of $h$--dichotomy, $h$--noncriticality and $h$--expansiveness of a linear nonautonomous ODE system which had been initiated in a previous work. Moreover, we…

Dynamical Systems · Mathematics 2026-03-31 Heli Elorreaga , Gonzalo Robledo , David Urrutia-Vergara

Understanding the linear response of any system is the first step towards analyzing its linear and nonlinear dynamics, stability properties, as well as its behavior in the presence of noise. In non-Hermitian Hamiltonian systems, calculating…

The paper begins with a novel variational formulation of Duffing equation using the extended framework of Hamilton's principle (EHP). This formulation properly accounts for initial conditions, and it recovers all the governing differential…

Numerical Analysis · Computer Science 2019-03-18 Jinkyu Kim , Hyeonseok Lee , Jinwon Shin