左定与定型Sturm-Liouville问题间特征值不等式

应用左定和定型Sturm-Liouville问题特征值的Prüfer角刻画,以及其特征值对边界和边值条件的单调依赖关系,本文建立了左定Sturm-Liouville与两个相关的定型Sturm-Liouville问题之间的特征值不等式关系.     

左定Sturm-Liouville算子的特征值计算(英文)

研究了定义在有限区间[a,b]上的具有分离型和混合型边界条件的左定正则Sturm-Liouville算子的特征值问题.把具有混合型边界条件的左定正则Sturm-Liouville问题转化成二维的、具有分离型边界条件的右定正则Sturm-Liouville问题,给出了具有混合型边界条件的左定正则Sturm-Liouville算子的特征值的数值计算方法.     

常型Sturm-Liouville问题的左定空间

本文刻画了常型Sturm-Liouville问题的左定空间的一般形式．根据自伴边值条件的分类,确切地给出了所有可能的左定空间描述．     

具有混合型边界条件的左定Sturm-Liouville问题特征值的下标计算(英文)

本文研究具有混合型边界条件的左定Sturm-Liouvile问题特征值的下标计算问题.首先给出具有分离型边界条件和混合型边界条件的左定Sturm-Liouville问题的特征值之间的不等式;然后利用这个结果给出一种计算混合型边界条件下左定Sturm-Liouville问题特征值下标的方法.     

不定与定型Sturm-Liouville问题间特征值不等式

应用不定和定型Sturm-Liouville(S-L)问题在直和空间上的等价刻画,以及其特征值对边界和边值条件的单调依赖关系,本文建立了不定型S-L问题与一个相关的定型S-L问题之间的特征值不等式关系.     

一类具有转移条件的Sturm-Liouville问题的特征值的渐近估计

研究了一类具有转移条件且一端点处边界条件含特征参数的Sturm-Liouville问题,利用儒歇定理,得到了特征值的渐近估计式.     

非局部Sturm-Liouville问题的特征值

本文研究含有非局部势的非局部Sturm-Liouville特征值问题的谱理论.利用修正的Green函数给出了一般情况下特征值的判别函数、下界估计、几何重数和分布位置.     

边界条件含特征参数的Sturm-Liouville问题的特征值比率

给出修正Prfer变换的几何意义以及相关性质,并利用上述性质讨论Sturm-Liouville问题-(py′)′+gy=λωy,x∈[0,1],参数边界条件为y(0)=0与((py′)(1))/(y(1))=aλ+b,得到了当a>0,q≥0的特征值比率上界,这把Ashbaugh等人的结果推广到边界条件含参数的情形.     

常型Sturm-Liouville问题的特征值

This article discuss on the existence condition and of Sturm-Liouville feature value by analyzing its existence, asymptotic distribution and locus formula in special instance.     

Extremal Eigenvalues of the Sturm-Liouville Problems with Discontinuous Coefficients

In this paper, an extremal eigenvalue problem to the Sturm-Liouville equations with discontinuous coefficients and volume constraint is investigated. Liouville transformation is applied to change the problem into an equivalent minimization problem. Finite element method is proposed and the convergence for the finite element solution is established. A monotonic decreasing algorithm is presented to solve the extremal eigenvalue problem. A global convergence for the algorithm in the continuous case is proved. A few numerical results are given to depict the efficiency of the method.     

Eigenvalues of periodic Sturm-Liouville problems by the Shannon-Whittaker sampling theorem

We are concerned with the computation of eigenvalues of a periodic Sturm-Liouville problem using interpolation techniques in Paley-Wiener spaces. We shall approximate the Hill discriminant by sampling a few of its values and then find its zeroes which are the square roots of the eigenvalues. Computable error estimates are provided together with eigenvalue enclosures.

     

一类Sturm-Liouville问题特征的渐近分析

考虑[0,1]上带第三类边界条件的S-L问题特征值的渐近表示.利用已有的渐近性结果及Fr啨chet导数技术,对特征值进行了精细的分析,清楚地给出了边界条件中的常数(h,H)对特征值的影响.本文的工作对S-L问题的一类反谱问题及相关微分方程反问题的唯一性结果有着重要的应用,也为专著[4,6]中的某些关键结果提供了一个简化的证明途径.     

Existence Results for a Class of Periodic Evolution Variational Inequalities

In this paper,using the Brouwer topological degree,the authors prove an existence result for finite variational inequalities.This approach is also used to obtain the existence of periodic solutions for a class of evolution variational inequalities.     

The finite spectrum of Sturm-Liouville problems with transmission conditions

We study the finite spectrum of Sturm-Liouville problems with transmission conditions. For any positive integer n, we construct a class of regular Sturm-Liouville problems with transmission conditions, which have exactly n eigenvalues, and these n eigenvalues can be located anywhere in the complex plane in non-self-adjoint case and anywhere along the real line in the self-adjoint case.     

Regularized Equilibrium Problems with Application to Noncoercive Hemivariational Inequalities

In this paper, we are concerned with noncoercive equilibrium problems associated with a bifunction which does not satisfy necessarily an algebraic monotonicity assumption. Our tool is a regularization procedure which we develop for equilibrium problems. The abstract existence result established is then applied to the solution of noncoercive hemivariational inequalities.