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1.
一类抛物型H-半变分不等式   总被引:2,自引:0,他引:2  
研究一类拟线性抛物型H-半变分不等式,即研究具有非凸、非光滑泛函的抛物型变分不等式。这类问题的研究来自力学。利用Clarke广义梯度和伪单调算子理论,证明了一类拟线性抛物型H-半变分不等式解的存在性。  相似文献   

2.
本文利用伪单调算子理论研究如下变分不等式问题,求x∈M,使得并将所得结果应用于拟线性椭圆型边值问题的求解。  相似文献   

3.
1.引言 稳态渗流自由边界问题大部可化为椭圆型变分不等式或拟变分不等式,其数值解已为不少作者所研究(参看[1],[2]及其文献)。某些轴对称问题则可化为另一类变分不等式一退化的椭圆型变分不等式。[3],[4]和[5]即用此法研究轴对称渗流井(水  相似文献   

4.
杨孝平 《应用数学》1992,5(1):67-73
本文考虑一类带互补边界条件的四阶半线性椭圆型变分不等式,应用临界点理论,证明了当半线性项具有超线性增长时解的存在性,并利用L~p估计得到了解的正则性.  相似文献   

5.
本文利用半序方法在Hausdorff拓扑线性空间中研究了一类一般形式的单调型隐变分不等式解的存在性问题。作为应用的例子,在文末我们应用所得结果,讨论了Nash平衡问题及半线性椭圆型方程解的存在性问题。  相似文献   

6.
主要研究一组带有非线性边界条件的非齐次拟线性椭圆型方程组非平凡解的存在性和多解性.利用山路引理和Ekeland变分准则,得到当λ属于特定区间时,此方程组至少存在两个非平凡解.  相似文献   

7.
一类非线性拟变分不等式及其应用   总被引:1,自引:1,他引:0  
本义研究了如下变分不等式问题:求u∈M使得a(u,v-u)+〈Gu,v-u〉≥(f,v-u),(?)u∈M.并将所得结论应用于二阶半线性椭圆型边值问题的求解.  相似文献   

8.
本文利用伪单调算子理论研究如下变分不等式问题:求x∈M,使得〈Ax,y-x〉+〈Gx,y-x〉≥〈f,y-x〉,?y∈M.并将所得结果应用于拟线性椭圆型边值问题的求解.  相似文献   

9.
利用沿同宿环的线性变分方程的线性独立解作为在同宿环的小管状邻域内的局部坐标系来建立Poincar啨映射,研究了高维系统扭曲同宿环的分支问题· 在非共振条件和共振条件下,获得了1_同宿环、1_周期轨道、2_同宿环、2_周期轨道和两重2_同期轨道的存在性、存在个数和存在区域· 给出了相关的分支曲面的近似表示· 同时,研究了高维系统同宿环和平面系统非扭曲同宿环的稳定性·  相似文献   

10.
该文使用Lions的集中紧性原理和变分方法,证明了一类非齐次拟线性椭圆型方程对应的障碍问题中极小正解的存在性.  相似文献   

11.
In this paper, well-posedness of a general class of elliptic mixed hemivariational–variational inequalities is studied. This general class includes several classes of the previously studied elliptic mixed hemivariational–variational inequalities as special cases. Moreover, our approach of the well-posedness analysis is easily accessible, unlike those in the published papers on elliptic mixed hemivariational–variational inequalities so far. First, prior theoretical results are recalled for a class of elliptic mixed hemivariational–variational inequalities featured by the presence of a potential operator. Then the well-posedness results are extended through a Banach fixed-point argument to the same class of inequalities without the potential operator assumption. The well-posedness results are further extended to a more general class of elliptic mixed hemivariational–variational inequalities through another application of the Banach fixed-point argument. The theoretical results are illustrated in the study of a contact problem. For comparison, the contact problem is studied both as an elliptic mixed hemivariational–variational inequality and as an elliptic variational–hemivariational inequality.  相似文献   

12.
This paper is devoted to a class of inverse coefficient problems for nonlinear elliptic variational inequalities. The unknown coefficient of elliptic variational inequalities depends on the gradient of the solution and belongs to a set of admissible coefficients. It is shown that the nonlinear elliptic variational inequalities is unique solvable for the given class of coefficients. The existence of quasisolutions of the inverse problems is obtained.  相似文献   

13.
This paper is devoted to a class of inverse coefficient problems for nonlinear elliptic hemivariational inequalities. The unknown coefficient of elliptic hemivariational inequalities depends on the gradient of the solution and belongs to a set of admissible coefficients. It is shown that the nonlinear elliptic hemivariational inequalities are uniquely solvable for the given class of coefficients. The result of existence of quasisolutions of the inverse problems is obtained.  相似文献   

14.
Existence, uniqueness and convergence of approximants of positive weak solutions for semilinear second order elliptic inequalities are obtained. The nonlinearities involved in these inequalities satisfy suitable upper or lower bound conditions or monotonicity conditions. The lower bound conditions are allowed to contain the critical Sobolev exponents. The methodology is to establish variational inequality principles for demicontinuous pseudo-contractive maps in Hilbert spaces by considering convergence of approximants and apply them to the corresponding variational inequalities arising from the semilinear second order elliptic inequalities. Examples on the existence, uniqueness and convergence of approximants of positive weak solutions of the semilinear second order elliptic inequalities are given.  相似文献   

15.
In this paper, we explore conditions under which certain elliptic hemivariational inequalities permit equivalent minimization principles. It is shown that for an elliptic variational–hemivariational inequality, under the usual assumptions that guarantee the solution existence and uniqueness, if an additional condition is satisfied, the solution of the variational–hemivariational inequality is also the minimizer of a corresponding energy functional. Then, two variants of the equivalence result are given, that are more convenient to use for applications in contact mechanics and in numerical analysis of the variational–hemivariational inequality. When the convex terms are dropped, the results on the elliptic variational–hemivariational inequalities are reduced to that on “pure” elliptic hemivariational inequalities. Finally, two representative examples from contact mechanics are discussed to illustrate application of the theoretical results.  相似文献   

16.
Confluent and Open Retractible Continua   总被引:2,自引:0,他引:2  
In this paper we deal with quasilinear elliptic hemivariational inequalities of higher order as generalizations of elliptic variational inequalities of higher order to nonconvex functionals. This extension is strongly motivated by various problems in mechanics. Using the notion of the generalized gradient of Clarke, existence results of solutions have been obtained.  相似文献   

17.
The paper deals with a finite element approximation of elliptic and parabolic variational inequalities. Elliptic hemivariational inequalities are equivalently expressed as a system consisting of one equation and one inclusion for a couple of unknowns, namely a primal variable u and an element belonging to a multivalued mapping at u. Both components of the solution are approximated independently each other by a finite element method. Parabolic inequalities are transformed into a system of elliptic ones by using an appropriate time discretization. A numerical experiment is realized by using non-smooth optimization methods.  相似文献   

18.
We develop a technique to obtain new symmetrization inequalities that provide a unified framework to study Sobolev inequalities, concentration inequalities and sharp integrability of solutions of elliptic equations.  相似文献   

19.
In this paper, we establish several new Lyapunov-type inequalities for two classes of one-dimensional quasilinear elliptic systems of resonant type, which generalize or improve all related existing ones. Then we use the Lyapunov-type inequalities obtained in this paper to derive a better lower bound for the generalized eigenvalues of the one-dimensional quasilinear elliptic system with the Dirichlet boundary conditions.  相似文献   

20.
We establish nonexistence of nontrivial solutions (including sign-changing ones) for some partial differential inequalities of elliptic and parabolic type containing nonlinear terms that depend on the positive and negative part of the sought function in different ways. Systems of elliptic inequalities with similar structure are also considered. The proofs are based on the test function method.  相似文献   

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