广义逆矩阵的连续性问题——数值相关性理论的应用

如所周知,m×n阶矩阵A的Moore—Penrose广义逆在A不满秩时是不连续的。本文证明,这种不连续性不是本质的,经保秩变形后就自动消失了。     

矩阵的加权Moore—Penrose逆

利用矩阵的广义奇异值分解，给出了复数域上矩阵的Moore—Penrose逆存在的充要条件及其表达式．     

任意除环上矩阵的广义逆

该文使用投影算子方法研究任意除环上矩阵的广义逆, 建立了具有指定值域和零空间的{2} 逆的刻划和表示理论. 作为应用, 获得了带有对合函数的Moore Penrose逆, 群逆和Dra zin逆的一些新的表式.     

具有泛分解的态射的广义逆

本文研究范畴中态射乘积ggq的广义逆．假设有态射p'和q',使得p'pg＝g＝gqq'．分别用g~+和g~#给出了乘积Pgq的Moore－Penrose逆和Drazin逆存在的充要条件及其表达式．     

矩阵方程A^TXB＋B^TX^TA=D的极小范数最小二乘解的迭代解法

1 引言 设R^m×n表示m×n实矩阵的全体，A^T表示矩阵A的转置，R（A）和N（A）分别表示矩阵A的值域和零空间，A^＋表示矩阵A的Moore—Penrose广义逆，A×B表示矩阵A与B的Kronecker乘积，     

体上矩阵的广义逆

关于矩阵广义逆的研究,自 R.Penrose 的论文发表以来,目前巳进行得相当深入,域上,以至某些交换环上矩阵的广义逆也已相继进行.但是,由于一般体的非交换性限制,任意体上矩阵的广义逆尚未见过具体的论述。在这篇文章中,我们将对具有一个对合反自同构的体,阐述其上矩阵的广义逆,将域上矩阵的 Moore-Penrose 逆存在的一个充要条件作了相应的推广,并给出了体上矩阵的 Moore-Penrose 逆、(1,…,i)一逆、(2)-逆的显式;最后,我们利用[7]中的一个结果,得到了四元数矩阵的(3)-逆、(4)-逆的显式。     

实对称矩阵在相合分解下的Moore-Penrose型广义逆的通式

1引言与符号说明对m×n矩阵A,下列矩阵方程：(1)AXA=A,(2)XAX=x,(3)(AX)~T=AX,(4)(XA)~T=XA称为Penrose方程．如果X满足上述方程(i)(j),…(k),则称X为(ij…k)逆,其全体记为A(ij…k)．(1234)逆常记为A~ ．所有这种矩阵叫广义逆(矩阵)或Moore- Penrose型逆(矩阵)．广义逆矩阵在许多数学领域有广泛应用．它在解矩阵方程中的作用     

一个向量函数的极值问题

利用矩阵的Moore Penrose逆给出实向量函数f(x) =xTAx +bTx +c存在极大或极小值的充要条件 ,以及极值的表达式     

Perturbations of Moore–Penrose Metric Generalized Inverses of Linear Operators in Banach Spaces

In this paper,the perturbations of the Moore–Penrose metric generalized inverses of linear operators in Banach spaces are described.The Moore–Penrose metric generalized inverse is homogeneous and nonlinear in general,and the proofs of our results are different from linear generalized inverses.By using the quasi-additivity of Moore–Penrose metric generalized inverse and the theorem of generalized orthogonal decomposition,we show some error estimates of perturbations for the singlevalued Moore–Penrose metric generalized inverses of bounded linear operators.Furthermore,by means of the continuity of the metric projection operator and the quasi-additivity of Moore–Penrose metric generalized inverse,an expression for Moore–Penrose metric generalized inverse is given.     

关于广义逆的注记

本文得到下列结果:命题1,在算子代数A 中充分必要条件(1,2)—A 存在的广义逆是(1)—A 存在的广义逆。命题2,让F 是一个域,4∈F~(mrn),(1.2)—A 的广义逆总是存在的.     

Moore-Penrose广义逆矩阵与线性方程组的解

线性方程组的逆矩阵求解方法只使用于系数矩阵为可逆方阵,对于一般线性方程组可以应用Moore-Penrose广义逆矩阵来研究并表示其通解,本文主要探讨Moore-Penrose广义逆矩阵及一般线性方程组通解和最小范数解.     

METRIC GENERALIZED INVERSE OF LINEAR OPERATOR IN BANACH SPACE＊＊＊

The Moore-Penrose metric generalized inverse T of linear operator T in Banach space is systematically investigated in this paper. Unlike the case in Hilbert space, even T is a linear operator in Banach Space, the Moore-Penrose metric generalized inverse T is usually homogeneous and nonlinear in general. By means of the methods of geometry of Banach Space, the necessary and sufficient conditions for existence, continuitv, linearity and minimum property of the Moore-Penrose metric generalized inverse T will be given, and some properties of T will be investigated in this paper.     

Further results on the reverse order law for the Moore-Penrose inverse in rings with involution

We present some equivalent conditions of the reverse order law for the Moore-Penrose inverse in rings with involution, extending some well-known results to more general settings. Then we apply this result to obtain a set of equivalent conditions to the reverse order rule for the weighted Moore-Penrose inverse in C^∗-algebras.     

具有广义分解态射的加权Moore-Penrose逆

研究范畴中态射的加权Moore-Penrose逆,利用态射广义分解的性质给出了态射加权Moore-Penrose逆存在的一些充要条件,导出了态射的加权Moore-Penrose逆的表达式,推广了态射Moore-Penrose逆的相应结果.     

关于态射的加权Moore-Penrose逆

研究了范畴中态射 f关于态射β和γ的加权 Moore-Penrose逆 fβ,γ+,分别给出了一般态射、有满单分解态射与有核 (上核 )的 fβ,γ+存在的充要条件及其相应的表达式 ,推广了 f关于对称态射β和γ的加权Moore-Penrose逆的相应结果 .     

Application of Moore-Penrose inverse in deciding the minimal martingale measure

The Moore-Penrose inverse is an important tool in algebra.This paper shows that the MoorePenrose inverse is also an effcient technique in determining the minimal martingale measure if a security price follows a semi-martingale which satisfies some structure condition.We extend a result of Dzhaparidze and Spreij concerning the Moore-Penrose inverse to the case that the Moore-Penrose inverse of any matrix-valued predictable process is still predictable.Furthermore,we obtain an explicit formula of the minimal martingale measure by employing the Moore-Penrose inverse.Specifically,the minimal martingale measure in a generalized Black-Scholes model is found.     

分块态射的广义逆

ClineRE给出了分块矩阵的Moore-Penrose逆的表达式,PetrPeska引进了分块态射的记号且导出了分块态射的Moore-Penrose逆的表达式.本文中,我们推广了Cline型分块态射的记号并得到了Cline型分块态射的Moore-Penrose逆和Drazin逆以及群逆的表达式.     

关于Fuzzy矩阵的Moore-Penrose逆

讨论Fuzzy矩阵的Moore-PenrOSe逆,给出一些Moore-Penrose逆存在的充要条件以及Moore-Penrose逆的划画。     

Moore-Penrose Inverse in Kreĭn Spaces

We discuss the notion of Moore-Penrose inverse in Kreĭn spaces for both bounded and unbounded operators. Conditions for the existence of a Moore-Penrose inverse are given. We then investigate its relation with adjoint operators, and study the involutive Banach algebra . Finally applications to the Schur complement are given.