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交换整环上三角矩阵的线性保持算子
【作者】 杨巍;
【导师】 曹重光;
【作者基本信息】 黑龙江大学 , 基础数学, 2007, 硕士
【摘要】 设R是一个交换整环,Mmn(R)与Tmn(R)分别为R上m×n的全矩阵模及上三角矩阵模,当m=n时,简记为Mn(R),Tn(R)。定义(?)(n1,…,nk)是由上三角块矩阵构成的矩阵模Mn(R)的子模。定义Eij表示(i,j)位置是1,其余位置是0的矩阵。f表示X到Y的保矩阵逆(群逆)线性映射,其全体记为N-1(X,Y)(或Nt(X,Y)),其中X,Y∈{Tn(R),(?)(n1,…,nk)}。本文去掉了对整环R的特征的限制,直接给出了当f(E1n≠0时,上三角矩阵模Tn(R)上的保逆线性满射的具体形式。作为上三角矩阵模的推广-上三角块矩阵模,文章则得到当R是至少含有3个单位的主理想整环时,N-1((?)(n1,…,nk),Mn(R))上的线性双射的具体形式。通过对过渡矩阵的限制,又刻画出N-1((?)(n1,…,nk),(?)(n1,…,nk))上双射的形式,并且作为应用,集合N-1(Tn(R),Tn(R))上的双射的具体形式被给出。作为矩阵逆的推广-矩阵群逆,本文也得到了当R是至少含有4个单位的主理想整环时,Nt((?)(n1,…,nk),Mn(R))上双射的具体形式,再通过对过渡矩阵的限制,Nt((?)(n1,…,nk),(?)(n1,…,nk))上双射的具体形式被刻画,同时作为应用,Nt(Tn(R),Tn(R))上双射的具体形式也被给出。
【Abstract】 Suppose R is a commutative integral domain, let Mmn(R) and Tmn(R) be themodule of m×n full matrices and the module of m×n upper triangular matrices overR, respectively. When m=n, Mmn(R) and Tmn(R) will be abbreviated to Mn(R)and Tn(R). By (?)(n1,…,nk) we designate the submodule of Mn(R) consisting of allblocked upper triangular matrices. Furthermore, for any i,j∈[1,n], Eij expressesthe matrix with 1 in the (i,j)th position and 0 elsewhere, the symbol N-1(X, Y)(orNt(X, Y)) denotes the set of f which is a preserving inverse linear map(or preservinggroup inverse linear map)from X to Y, X, Y∈{Tn(R), (?)(n1,…,nk)}.In this paper, we get rid of the restraint to R’s characteristic, the linear surjec-tion in N-1(Tn(R)) are given directly when f(E1n)≠0. as the extend to module ofupper triangular matrices-module of blocked upper triangular matrices, we also getthe forms of the assemblage of N-1((?)(n1,…,nk), Mn(R)) when R is a principal idealdomain with 3 units at least and f is bijection. Furthermore, by restricting theintermediate matrix, the set of N-1((?)(n1,…,nk),(?)(n1,…,nk)) are characterized. As anapplication, the forms of the linear bijection in Tn(R) preserving inverse of matrixare also given.As the extend to the inverse of matrix-matrix’s group inverse, when R is a prin-cipal ideal domain with 4 units at least, the linear bijection in Nt((?)(n1,…,nk), Mn(R))are described, by restricting the intermediate matrix, the set of Nt((?)(n1,…,nk), (?)(n1,…,nk))are characterized also. Meanwhile, the forms of the linear bijection in Tn(R) pre-serving group inverse of matrix are given too.
- 【网络出版投稿人】 黑龙江大学 【网络出版年期】2008年 04期
- 【分类号】O153.3
- 【被引频次】2
- 【下载频次】97