Monotone iterative technique for second order delayed periodic problem in Banach spaces

Monotone iterative technique for second order delayed periodic problem in Banach spaces
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Banach空间二阶时滞周期问题的单调迭代技术

DOI:
10.1016/j.amc.2015.08.070
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发表时间:
2015-11
影响因子:
4
通讯作者:
Li Yongxiang
Li Yongxiang
中科院分区:
数学2区
文献类型:
--
作者:
Li Qiang;Li Yongxiang

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研究了一类二阶时滞泛函微分方程E − u ′ ′(t)= f(t,u(t),u(t − τ)),t ∈ R中ω-周期解的存在性,其中E是序Banach空间,f:R × E × E → E是关于t的ω-周期连续函数,τ ≥ 0是常数.我们首先建立了相应的线性时滞方程的ω-周期解的一个新的极大值原理。借助于这一极大值原理,在非线性函数拟单调的假设下,结合扰动方法和上下解的单调迭代技巧,研究了抽象时滞方程最小和最大周期解的存在性.
In this paper, we deal with the existence of ω-periodic solutions for second-order functional differential equation with delay in E− u′′(t)= f (t, u (t), u (t− τ)), t∈ R, where E is an ordered Banach space, f: R× E× E→ E is a continuous function which is ω-periodic in t and τ≥ 0 is a constant. We first build a new maximum principle for the ω-periodic solutions of the corresponding linear equation with delay. With the aid of this maximum principle, under the assumption that the nonlinear function is quasi-monotonicity, we study the existence of the minimal and maximal periodic solutions for abstract delayed equation by combining perturbation method and monotone iterative technique of the lower and upper solutions.
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