具有Lipschitz连续系数的Kirchhoff方程

作者考虑了一个非局部项仅为Ｌｉｐｓｃｈｉｔｚ连续函数的非齐次Ｋｉｒｃｈｈｏｆ方程的Ｃａｕｃｈｙ问题．在初值和右端项“小”的条件下，我们获得了此问题整体解的存在唯一性．     

四元数分析中的T算子与两类边值问题

本文研究四元数分析中的非齐次 Ｄｉｒａｃ方程．引入了这类方程的分布解即 Ｔ算子,证明了Ｔ算子的一些性质并考察了非齐次Ｄｉｒａｃ方程的Ｄｉｒｉｃｈｌｅｔ边值问题,并将结果推广到高阶非齐次Ｄｉｒａｃ方程及这种方程的一类边值问题的情况．     

关于非局部场论的几个新观点及其在断裂力学中的应用（Ⅲ）——重论线 …

证明了在线性非局部弹性力学中能量平衡方程是动量平衡方程的首次积分,论证了在非局部场论中局部化体力残余恒为零。详细推导了线性非局部弹性理论的本构方程,得到了反对称应力存在的新结果。     

关于非局部场论的几个新观点及其在断裂力学中的应用(Ⅲ)——重论线性非局部弹性理论

证明了在线性非局部弹性力学中能量平衡方程是动量平衡方程的首次积分,论证了在非局部场论中局部化体力残余恒为零。详细推导了线性非局部弹性理论的本构方程,得到了反对称应力存在的新结果。     

高阶椭圆型方程的非局部边值问题

<正> 本文讨论一般椭圆型方程的非局部边值问题.这类非局部边值问题与F.E.Browder,M.Schechter,J.L.Lions,E.Magenes等人所讨论的非局部边值问题不同.一般情形下,对于2m阶方程需要给出2m个非局部边界条件,从某种意义上来说要更“非局部”一些.我们在[4]中讨论的二阶自共轭椭圓型方程与重调和方程的互补边值问题就是     

无限维线性-非二次最优控制问题

本文研究一类较文［１６］提出的问题更为一般的线性－非二次最优控制问题．引进了所谓积分拟－Ｒｉｃｃａｔｉ方程并揭示了它与一非线性积分方程族之间的双向联系．凭此建立起积分拟－Ｒｉｃｃａｔｉ方程之解的存在唯一性．随后，利用积分拟－Ｒｉｃｃａｔｉ方程的解完成了最优控制问题的闭环综合．最后还导出了积分拟－Ｒｉｃｃａｔｉ方程之解关于其参数的一个连续依赖性定理，据之可以用适当的有限维最优控制问题的闭环解来逼近本文所考虑的无限维最优控制问题的闭环解．     

一般耦合Maxwell－SchrOdinger方程的Cauchy问题（1）

本文研究了一般耦合Ｍａｘｗｅｌｌ－Ｓｃｈｒｏｄｉｎｇｅｒ方程的Ｃａｕｃｈｙ问题，采用正则化方法，借助于推广的Ｈ．Ｐｅｃｈｅｒ引理及其它分析工具，在光滑解的框架下，建立了任意维空间中一般耦合Ｍａｘｗｅｌｌ－Ｓｃｈｒｏｄｉｎｇｅｒ方程的Ｃａｕｃｈｙ问题的局部适定性．     

C^n中的界域上σ—方程局部解的Bochner—Ono公式

本文利用Ｏｎｏ的局部化方法及Ｘｅнкин的技巧，讨论Ｃ＾ｎ空间中有界域上σ－方程局部解的存在性，并得到有界域上σ－方程局部解的Ｂｏｃｈｎｅｒ－Ｏｎｏ公式，且指出在含参数的局部意义下有简单的一致估计。     

高阶Schrodinger方程的差分格式

高阶Ｓｃｈｒｏｄｉｎｇｅｒ方程的差分格式曾文平（泉州华侨大学应用数学系泉州３６２０ｉｆ）关键词：显式差分格式；稳定性分析；高阶Ｓｃｈｒｏｄｉｎｇｅｒ方程ＡＭＳ（１９９１）主题分类：６５Ｍ０６，６５Ｍ１２．高阶Ｓｃｈｒｓｄｉｎｇｅｒ方程在量子力学、非线...     

高阶非齐次GBBM方程

本文研究了高阶非齐次ＧＢＢＭ方程的Ｃａｕｃｈｙ问题和初边值问题。对任意的有界或无界光滑区域Ω，采用Ｂａｎａｃｈ不动点原理及一系列的积分估计，建立了高阶非齐次ＧＢＢＭ方程的Ｃａｕｃｈｙ问题和初边值问题在Ｗ＾２ｍ，ｐ（Ω）上整体强解的存在唯一性，这些结果改进并完善了ＢＢＭ方程的已有结果，与此同时，我们还讨论了强解的正则性。     

Theorem about existence and uniqueness of continuous solution of nonlocal problem for nonlinear hyperbolic equation

The aim of the paper is to give a theorem about the existence and uniqueness of the continuous solution of a non-linear differential hyperbolic problem with a nonlocal condition in a bounded domain. The Banach theorem about the fixed point is used to prove the existence and uniqueness of the problem considered. The results obtained in this paper can be applied in the theory of elasticity with better effect than the analogous known result with the classical initial condition.     

非线性发展方程非局部初值问题解的存在性

本文讨论非线性方程的非局部初值问题，利用半群理论、单调算子理论以及Banach不动点定理，分别得到两个问题的温和解和弱解的存在唯一性定理．     

Existence of Solutions for Impulsive Neutral Integro-Differential Inclusions with Nonlocal Initial Conditions via Fractional Operators

This paper is mainly concerned with existence of mild solutions for first-order impulsive neutral integro-differential inclusions with nonlocal initial conditions in α-norm. We assume that the undelayed part generates an analytic resolvent operator and transforms it into an integral equation. By using a fixed point theorem for condensing multivalued maps, a main existence theorem is established. As an application of this main theorem, a practical consequence is derived for the sublinear growth case. Finally, we present an application to a neutral partial integro-differential equation with Dirichlet and nonlocal initial conditions.     

Eigenvalue intervals for nonlocal fractional order differential equations involving derivatives

In this paper, we firstly consider the nonlocal fractional order differential equations involving derivatives. By means of a fixed-point theorem on a cone, the eigenvalue intervals of the above problem are established. Then by using a fixed point theorem for operators on a cone, we establish sufficient conditions for the existence of multiple (at least three) positive solutions to the nonlocal boundary value problem.     

Perturbation method for nonlocal impulsive evolution equations

This paper deals with the existence of mild solutions for a class of semilinear nonlocal impulsive evolution equations in ordered Banach spaces. The existence and uniqueness theorem of mild solution for the associated linear nonlocal impulsive evolution equation is established. With the aid of the theorem, the existence of mild solutions for nonlinear nonlocal impulsive evolution equation is obtained by using perturbation method and monotone iterative technique. The theorems proved in this paper improve and extend some related results in ordinary differential equations and partial differential equations. Moreover, we present two examples to illustrate the feasibility of our abstract results.     

Fractional Retarded Differential Equations Involving Mixed Nonlocal Plus Local Initial Conditions

Abstract

The aim of this paper is to discuss the existence of mild solutions and positive mild solutions for a general class of semilinear fractional retarded evolution equations subjected to mixed nonlocal plus local initial conditions on infinite dimensional Banach spaces. Under the situation that the nonlinear term and nonlocal function satisfy some appropriate growth conditions and a noncompactness measure condition, we obtained the existence of mild solutions and positive mild solutions by utilizing a generalized Darbo’s fixed point theorem and a new estimation technique of the measure of noncompactness. In addition, the strong restriction on the constants in the condition of noncompactness measure is completely deleted in this paper. An example about the retarded parabolic partial differential equation involving a general mixed nonlocal plus local initial conditions is also given to illustrate the feasibility of our abstract results.     

On the conservation laws and invariant solutions of the mKdV equation

In this paper, we consider modified Korteweg-de Vries (mKdV) equation. By using the nonlocal conservation theorem method and the partial Lagrangian approach, conservation laws for the mKdV equation are presented. It is observed that only nonlocal conservation theorem method lead to the nontrivial and infinite conservation laws. In addition, invariant solution is obtained by utilizing the relationship between conservation laws and Lie-point symmetries of the equation.     

A COMPREHENSIVE PROOF OF THE GREENBERGER-HORNE-ZEILINGER THEOREM FOR THE FOUR-QUBIT SYSTEM

Greenberger-Horne-Zeilinger(GHZ)theorem asserts that there is a set of mutually commuting nonlocal observables with a common eigenstate on which those ob- servables assume values that refute the attempt to assign values only required to have them by the local realism of Einstein,Podolsky,and Rosen(EPR).It is known that for a three-qubit system.there is only one form of the GHZ-Mermin-like argument with equiva- lence up to a local unitary transformation,which is exactly Mermin's version of the GHZ theorem.This article for a four-qubit system,which was originally studied by GHZ,the authors show that there are nine distinct forms of the GHZ-Mermin-like argument.The proof is obtained using certain geometric invariants to characterize the sets of mutually commuting nonlocal spin observables on the four-qubit system.It is proved that there are at most nine elements(except for a different sign)in a set of mutually commuting nonlocal spin observables in the four-qubit system,and each GHZ-Mermin-like argument involves a set of at least five mutually commuting four-qubit nonlocal spin observables with a GHZ state as a common eigenstate in GHZ's theorem.Therefore,we present a complete construction of the GHZ theorem for the four-qubit system.     

Multiple solutions for a nonlocal problem in Orlicz–Sobolev spaces

Using the mountain pass theorem combined with the minimum principle, we obtain a multiplicity result for a nonlocal problem in Orlicz–Sobolev spaces. To our knowledge, this is the first contribution to the study of nonlocal problems in this class of spaces.     

A note on a nonlocal nonlinear reaction–diffusion model

We give an application of the Crandall–Rabinowitz theorem on local bifurcation to a system of nonlinear parabolic equations with nonlocal reaction and cross-diffusion terms as well as nonlocal initial conditions. The system arises as steady-state equations of two interacting age-structured populations.