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Levitan/Bohr almost periodic and almost automorphic solutions of second order monotone differential equations

机译:Levitan / Bohr二阶单调微分方程的概周期和概自解

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摘要

The aim of this paper is to prove the existence of Levitan/Bohr almost periodic, almost automorphic, recurrent and Poisson stable solutions of the second order differential equation x″=f(σ(t,y),x,x′)(y∈Y) (1) where Y is a complete metric space and (Y,R,σ) is a dynamical system (also called a driving system). When the function f in (1) is increasing with respect to its second variable, the existence of at least one quasi periodic (respectively, Bohr almost periodic, almost automorphic, recurrent, pseudo recurrent, Levitan almost periodic, almost recurrent, Poisson stable) solution of (1) is proved under the condition that (1) admits at least one solution φ such that φ and φ' are bounded on the real axis.
机译:本文的目的是证明存在于二阶微分方程x''= f(σ(t(y),x,x')(y ∈Y)(1)其中Y是一个完整的度量空间,而(Y,R,σ)是一个动力系统(也称为驱动系统)。当(1)中的函数f相对于其第二个变量增加时,至少存在一个准周期(分别是Bohr几乎周期,几乎自养,递归,伪递归,Levitan几乎周期性,几乎递归,泊松稳定)在(1)允许至少一个解φ使得φ和φ'限制在实轴上的条件下证明(1)的解。

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