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1.
The aim of this article is to study the existence of solutions to some classes of semilinear impulsive neutral functional differential inclusions in Banach spaces. We shall make use of a fixed point theorem for contraction multivalued maps due to Covitz and Nadler.  相似文献   

2.
Banach空间中半线性发展方程的复合单调迭代技巧   总被引:1,自引:0,他引:1  
本文对具有正则锥的序Banach空间中半线性发展方程,利用C0-半群理论和复合单调迭代技巧,构造出了抽象迭代格式,并建立了最大、最小(拟)解的存在性.  相似文献   

3.
在不要求C0-半群为紧半群的前提下.利用函数e^-λt(其中λ〉0是常数)和Monch不动点定理,在更广泛的条件下,得到了Banach空间中一类半线性混合型发展方程初值问题的整体mild解和正mild解,本质上改进和推广了已有相关结果.  相似文献   

4.
Banach空间半线性发展方程的周期解   总被引:8,自引:2,他引:8  
李永祥 《数学学报》1998,41(3):629-636
把上、下解方法引入到有序Banach空间中的半线性发展方程周期解问题,利用正算子半群特征与单调迭代程序,获得了最大周期解与最小周期解的存在性.所得的结果概括和推广了常微分方程与偏微分方程中的有关结论  相似文献   

5.
We study a new type of solutions to differential inclusions in Banach spaces, which we call directional solutions. The idea is based on the observation that for a differentiable function and a closed set
The above formula, which ‘makes sense’ also for non-differentiable functions, allows us to investigate nowhere differentiable solutions to differential inclusions. Thus we say that is a directional solution to if
We show that directional solutions have better properties than classical ones, in particular a limit of a convergent sequence of approximate solutions is an exact solution. We also prove that is a directional solution to if
  相似文献   

6.
证明了每个可分无限维复Banach空间上都存在一个强混合的Co-半群,在加权函数空间上给出了转移半群是强混合的一个充要条件.  相似文献   

7.
奇异半线性发展方程的局部Cauchy问题   总被引:8,自引:1,他引:8  
蹇素雯 《数学学报》1997,40(5):793-800
本文在Banach空间E中讨论如下问题dudt+1tσAu=J(u),0<tT,limt→0+u(t)=0,其中u:(0,T]E,A是与t无关的线性算子.(-A)是E上C0半群{T(t)}t0的无穷小生成元,常数σ1,J是一个非线性映射EJ→E.它满足局部Lipschitz条件.我们证明了当其Lipschitz常数l(r)满足一定条件时.问题(S)有局部解,且在某函类中解唯一.设J(u)=|u|γ-1u+f(x)(γ>1),E=Lp,EJ=Lpγ时得到了与Weisler[2]在非奇异情形类似的结果.  相似文献   

8.
In this article, we investigate sufficient conditions for controllability of second order semi-linear neutral functional initial value problem for the class of differential inclusions in Banach spaces using the theory of strongly continuous cosine families. We shall rely on a fixed point theorem due to Ma for multi-valued maps. An example is provided to illustrate the result. This work is motivated by the paper of Benchohra, Gorniewicz and Ntouyas [7].In honour of Prof. M.C. Joshi, IIT Bombay, INDIA.  相似文献   

9.
秦松喜 《数学研究》1999,32(1):83-85,91
利用不动点方法,证明了Banach-空间中右端项不连续的微分包含解的存在性.  相似文献   

10.
Let X be a separable Banach space with dual X *. A countable family of elements {g i }X * is a p-frame (1 p ) if the norm X is equivalent to the p -norm of the sequence {g i ()}. Without further assumptions, we prove that a p-frame allows every gX * to be represented as an unconditionally convergent series g=d i g i for coefficients {d i } q , where 1/p+1/q=1. A p-frame {g i } is not necessarily linear independent, so {g i } is some kind of overcomplete basis for X *. We prove that a q-Riesz basis for X * is a p-frame for X and that the associated coefficient functionals {f i } constitutes a p-Riesz basis allowing us to expand every fX (respectively gX *) as f=g i (f)f i (respectively g=g(f i )g i ). In the general case of a p-frame such expansions are only possible under extra assumptions.  相似文献   

11.
In this paper, we prove controllability results for semilinear neutral functional differential inclusions with finite or infinite delay in Banach spaces. Our theory makes use of analytic semigroups and fractional powers of closed operators, integrated semigroups and cosine families.  相似文献   

12.
宋福民 《应用数学和力学》1998,19(11):1021-1029
本文在无穷维Banach空间中讨论微分包含解的存在性,先给出了几个普通微分包含的比较定理,讨论了近似解与解的关系,然后得到了Banach空间中微分包含解的存在性定理.  相似文献   

13.
研究在非自反状态空间和自反控制空间中无限维线性系统x(t)=Ax(t) Bu(t)的精确能控性和精确零能控性.当A生成C-半群时,得到这个系统关于L~p([O,T],U),1相似文献   

14.
王志华 《数学研究》1995,28(2):54-59
本文研究可分Banach空间中泛函微分包含的解轨道的可生存性,建立了无限维空间中泛函微分包含的生存定理,其推论部分地回答了泛函微分方程中的一个开问题。  相似文献   

15.
In this paper we prove the existence of solutions of some types of second order implicit differential inclusions in reflexive smooth Banach spaces.  相似文献   

16.
In this paper we prove existence results for semilinear neutral functional differential inclusions with finite or infinite delay in Banach spaces. Our theory makes use of analytic semigroups and fractional powers of closed operators, integrated semigroups and cosine families.   相似文献   

17.
主要研究了Banach空间一类具有阻尼项的二阶微分包含的可控性,利用集值映射不动点定理,讨论了集值函数取凸值的情况,给出了微分包含可控性的充分条件.  相似文献   

18.
In this paper, we establish sufficient conditions for the controllability of functional differential and integrodifferential inclusions in Banach spaces. We rely on a fixed-point theorem for condensing maps due to Martelli.  相似文献   

19.
In this paper, the controllability of second-order differential and integro-differential inclusions in Banach spaces are investigated. Two new results are obtained by using the theory of strongly continuous cosine families and a fixed point theorem for multivalued maps. Communicated by F. Zirilli Research supported by NNSF of China Grant 10571078, by NSF of Gansu Province of China Grant ZS011-A25-007-Z, and by the Teaching and Research Award Program for Outstanding Young Teacher in Higher Education Institutions, Ministry of Education of China.  相似文献   

20.
In this paper we study the structure of various classes of spaces of vector-valued functions M(\mathbbR;X){\mathcal{M}(\mathbb{R};X)} ranging between periodic functions and bounded continuous functions. Some of these functions are introduced here for the first time. We propose a general operator theoretical approach to study a class of semilinear integro-differential equations. The results obtained are new and they recover, extend or improve variety of recent works.  相似文献   

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