Self-adjoint realization of a class of third-order differential operators with an eigenparameter contained in the boundary conditions

The present paper deals with a class of third-order differential operators with eigenparameter dependent boundary conditions. Using operator theoretic formulation, the self-adjointness of this operator is proved, the properties of spectrum are investigated, its Green function and the resolvent operator are also obtained.     

三维拟线性波方程的小初值光滑解

对三维小初值拟线性波方程3∑(i,j=0)g~(ij)(u)■_(ij)u=0,H.Lindblad证明了它有整体光滑解.本文考虑如下带有小初值的拟线性波方程3∑(i,j=0)g~(ij)(u)■_(ij)u=(■u)~3,通过得到低阶导数的衰减估计和高阶导数的能量估计,由连续论证法证明了这个方程也存在整体光滑解.     

约束条件为加法-取小模糊关系系统的带权min-max规划

定义了目标函数为带权重的min-max规划,约束条件为加法-取小模糊关系不等式系统,研究此模糊关系规划问题的求解思路和方法。当此模糊关系系统相容时,给出了一个求解此模糊关系规划问题的新算法和例子。     

Difference operators,Green's matrix,sampling theory and applications in signal processing

This paper introduces sampling representations for discrete signals arising from self adjoint difference operators with mixed boundary conditions. The theory of linear operators on finite-dimensional inner product spaces is employed to study the second-order difference operators. We give necessary and sufficient conditions that make the operators self adjoint. The equivalence between the difference operator and a Hermitian Green's matrix is established. Sampling theorems are derived for discrete transforms associated with the difference operator. The results are exhibited via illustrative examples, involving sampling representations for the discrete Hartley transform. Families of discrete fractional Fourier-type transforms are introduced with an application to image encryption.     

Random fixed point theorems for Hardy-Rogers self-random operators with applications to random integral equations

In this paper, we prove some random fixed point theorems for Hardy–Rogers self-random operators in separable Banach spaces and, as some applications, we show the existence of a solution for random nonlinear integral equations in Banach spaces. Some stochastic versions of deterministic fixed point theorems for Hardy–Rogers self mappings and stochastic integral equations are obtained.