非负不可约矩阵的广义Perron补矩阵

1989年Meyor为计算马尔可夫链的平稳分布向量构造了一个算法，首次提出非负不可约矩阵的Perron补矩阵的概念，本给出非负不可约矩阵A的广义Perron补矩阵若干性质，并且证明若矩阵A是不可约逆M-矩阵，其广义Perron补矩阵也是不可约逆M-矩阵。     

矩阵序列的有理外推法

基于矩阵的广义逆,本文给出了关于矩阵序列加速收敛的三个有理外推方法.它们包括:(i)基于广义逆的矩阵Pade逼近[4];(ii)矩阵Epsilon算法;(iii)矩阵Aitken △~2-算法。对三种方法之间的内在联系进行了讨论。关于Markov过程的一个实例给出以说明本文的结果。     

关于Quantale矩阵M-P广义逆的注记

主要指出文[1]关于M-P广义逆若干定理成立遗漏的条件,并在文[1]的基础上对M-P广义逆进行深入研究,得到关于Quantale矩阵M-P广义逆的一些新结论.     

不可约逆M-矩阵的广义Perron补

1989年,Meyor为计算马尔可夫链的平稳分布向量构造了一个算法,提出了非负不可约矩阵的Perron补矩阵的概念,2002年Linzhang Lu提出了的广义Perron补矩阵.本文推广了Neuman的结果得到了关于不可约逆M-矩阵广义Perron补矩阵的几个性质.     

局部环上幂等矩阵线性组合广义逆之间的关系

设R是2为单位的局部环.研究了R上三个两两可换的n阶非零幂等矩阵的线性组合广义逆之间的包含关系,确定了R上一类特殊矩阵广义逆的列表算法.利用这种列表算法和相关的矩阵理论,得到了这些矩阵线性组合广义逆之间的包含关系的充要条件,推广了矩阵自反广义逆的逆反律的相关结果.     

关于非负不可约矩阵的广义Perron补的一些性质

1989年Meyer为计算马尔可夫链的平稳分布向量构造了一个算法，首次提出非负不可约矩阵的Perron补的概念。本文给出非负不可约矩阵A的广义Perron补若干性质，并且证明当矩阵A是不可约逆M-矩阵，其广义Perron补也是不可约逆M-矩阵。     

多项式矩阵求逆的连分式插值方法

本文借助于基于广义逆矩阵Thiele-型连分式插值的计算公式，建立了多项式矩阵求逆的一个新方法。关于多项式矩阵求逆的一个实例给出以说明本文的结果。     

广义周期七对角矩阵的求逆新算法

讨论了广义周期七对角矩阵的求逆问题,利用七对角矩阵的特殊结构,通过矩阵的广义LU分解,给出了一种求解广义周期七对角逆矩阵的新型算法,该算法不需要对矩阵的各阶顺序主子式做任何限制并且适用于多种计算机代数系统,如：Mathematics,Macsyma,Matlab和Maple等.最后通过算例来说明了算法的有效性。     

环Z/p~kZ上矩阵广义逆的拓展

设R=Z/pkZ(其中k>1,p是一个奇素数),A是R上一个给定的可相似对角化的n阶矩阵.利用组合方法和有限局部环上的矩阵方法,讨论了矩阵A的拓展广义逆,得到了矩阵A的拓展广义逆存在的充要条件和一些的计数定理.     

矩阵之和的加权Moore—Penrose逆

§1.引言 Cline在[2]中讨论了矩阵UU~* VV~*的广义逆,并当UV~*=0(或U~*V=0)时给出了矩阵之和U V的广义逆的表达式。本文讨论矩阵UW_1U~* VW_2V~* VT~*U~* UTV~*的加权广义逆,其中[_(T~*W_2)~(W_1T)]是正定矩阵。并当UN~(-1)V~*=0(或U~*MV=0)时给出了矩阵之和U V的加权广义逆的表示。作为特例,给出了不同于[2]的UU~* VV~*及U V的广义逆的表达式。     

函子的广义逆

本文建立了函子的广义逆．得到：（１）函子的广义逆从不同于视矩阵为态射的另一角度，包含了“矩阵的广义逆”．（２）函子的广义道与态射的广义逆互不蕴含，但却有异曲同工之处．     

M-P invertible matrices and unitary groups over Fq2

The Moor-Penrose generalized inverses (M-P inverses for short) of matrices over a finite field Fq2, which is a generalization of the Moor-Penrose generalized inverses over the complex field, are studied in the present paper. Some necessary and sufficient conditions for an m×n matrix A over Fq2 having an M-P inverse are obtained, which make clear the set of m×n matrices over Fq2 having M-P inverses and reduce the problem of constructing and enumerating the M-P invertible matrices to that of constructing and enumerating the non-isotropic subspaces with respect to the unitary group. Based on this reduction, both the construction problem and the enumeration problem are solved by borrowing the results in geometry of unitary groups over finite fields.     

A theorem on inverse of tridiagonal matrices

Tridiagonal or Jacobi matrices arise in many diverse branches of mathematics and have been studied extensively. However, there is little written about the inverses of such matrices. In this paper we characterize those matrices with nonzero diagonal elements whose inverses are tridiagonal. The arguments given are elementaryand show that matrices with tridiagonal inverses have an interesting structure.     

除环上rcf方阵的逆方阵

讨论了除环Ｒ上ｒｃｆ方阵的逆方阵问题,证明了除环Ｒ上ｒｃｆ方阵各种逆方阵存在的充分必要条件。     

Exact inverses of certain band matrices

Summary A method for determining exact inverses for arbitrary size band matrices of Toeplitz type and closely related types is outlined. A number of examples arising in statistical problems and finite differences are considered and the initial required elements of the inverses are given.     

Rank equalities related to outer inverses of matrices and applications

A matrix X is called an outer inverse for a matrix A if XAX=X. In this paper, we present some basic rank equalities for difference and sum of outer inverses of a matrix, and apply them to characterize various equalities related to outer inverses, Moore-Penrose inverses, group inverses, Drazin inverses and weighted Moore-Penrose inverses of matrices.     

A new class of matrices with positive inverses

It is well known that irreducibly diagonally dominant matrices with positive diagonal and non-positive off-diagonal elements have positive inverses. A whole class of symmetric circulant and symmetric quindiagonal Toeplitz matrices with positive inverses which do not satisfy the above conditions is found.     

Nonnegative integral generalized inverses

Necessary and sufficient conditions are given for a nonnegative integral matrix to have nonnegative integral generalized inverses of various types, and the possible ranks of these inverses are determined. More generally, conditions are also given for matrices to have generalized inverses over certain subsets of the nonnegative reals forming monoids under addition and multiplication. Many of our results are adapted from results of Berman and Plemmons [3–6] on real matrices.     

用二值矩阵表示研究格矩阵的{1}-广义逆和{1,2}-广义逆

用二值矩阵表示的方法(即将格矩阵表示成二值矩阵的线性组合)研究了分配格上矩阵的{1}-广义逆和{1,2}-广义逆. 讨论了{1}-广义逆和{1,2}-广义逆存在的充分必要条件. 给出了判断这些逆是否存在且存在时找出所有这些逆的算法. 从而解决了Kim和Roush(K.H.Kim,F.W.Roush. Generalized fuzzy matrix. Fuzzy Sets and Systems,1980,4(3):293～315)及部分解决了Cao和Kim(Z.Q.Cao,K.H.Kim,F.W.Roush. Incline algebra and applications. New York:John Wiley,1984)提出的问题.     

从对称矩阵代数到全矩阵代数的线性群逆保持

设F是一个特征不为2的域,Mn(F)和Sn(F)分别记F上的n×n全矩阵代数和对称矩阵代数.所有的从Sn(F)到Mn(F)的保群逆的线性映射被刻划,作为一个中间步骤,三个矩阵的同时相似标准形也被证明.这个标准形简化了从Sn(F)到Mn(F)的保群逆的线性映射的刻划.