共查询到19条相似文献,搜索用时 54 毫秒
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文章证明了:如果R或要为本原Artin的Exchange环,则Mn(R)≌(S)当且仅当R≌S。 相似文献
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本文用则模的术语给出了半单Artin 环的刻划。得到如下三个条件的等价性:(1)R 是一个半单Artin 环;(2)每一个R-模都是正则模;(3)每一个单纯R-模都是正则模。 相似文献
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环上矩阵的广义Moore-Penrose逆 总被引:14,自引:0,他引:14
本文给出带有对合的有1的结合环上一类矩阵的广义Moore-Penrose逆存在的充要条件,而这类矩阵概括了左右主理想整环,单Artin环上所有矩阵。 相似文献
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定义了环R上的块循环矩阵环A,主要证明了下列结论:(1)若J是A的理想,d1,d2,…,dn是R的可逆元,则存在R的理想I使得J=I[σ1,σ2,…,σn].(2)若d1,d2,…,dn是R的可逆元,则(i)R是单环当且仅当A是单环;(ii)R是局部环当且仅当A是局部环;(iii)J(A)=J(R)[σ1,σ2,…,σn];(iv)R是半本原环当且仅当A是半本原环.(3)若d1,d2,…,dn都是R的幂零元,则J(A)=J(R) ( (i1,i2,…,im)∈r\(0,0,….0n)}RO2 2^1 O2 2^3…O2 2^3.(4)R是左Artin(Noether)环当且仅当A是左Artin(Noether)环.(5)若R有左Morita对偶(自对偶),则A有左Morita对偶(自对偶). 相似文献
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本文研究了一般半群环的右Artin性的刻划问题,改进了JanOkniski在[3]中的结果,并给出了半群环是右Artin环的刻划.最后进一步指出在一定条件下,R[S1]和R[S1]的链条件是等价的. 相似文献
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p—除环上矩阵秩的恒等式 总被引:1,自引:0,他引:1
本文证明了[1]中的猜测:在p—除环上有恒等式r(?)=r(A) r(B) ((I_s-BB~ )C(I_n-A~ A)),并且改进了这个结果,此外还给出了几个关于矩阵秩的恒等式.设Ω是p-除环,A是Ω上的m×n矩阵.μ(A)表示由A的行向量张成的Ω上的左向量空间,N(A)表示满足XA=0的行向量张成的Ω上的左向量空间,则μ(A)(?)Ω,N(A)(?)Ω_m,μ(A)、N(A)、Ω_m、Ω_n都是左Ω—模,并且dim N(A)=m-r(A).引理1 A、B、C分别是Ω上的m×n、m×s和s×n矩阵,那么 相似文献
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We introduce and study subrings with simple 0-multiplication of matrix rings in the context of Armendariz rings. In this way we extend several known results in the area. 相似文献
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A characterization of gr-simple rings is given by using the notion of componentwise-dense subrings of a full matrix ring over a division ring. As a consequence, any G-graded full matrix ring over a division ring is isomorphic to a dense subring of a full matrix ring with a good G-grading. Some conditions for a grading of a full matrix ring to be isomorphic to a good one are given, which generalize some results in: Dascascu, S., Lon, B., Nastasescu, C. and Montes, J. R., Group gradings on full matrix rings, J. Algebra, 220(1999), 709-728. 相似文献
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Bhanumati Dasgupta 《代数通讯》2013,41(1):213-233
This article investigates isomorphisms between certain subgroups of the projective unitary groups of hermitian modules over semisimple Artinian rings with anti-structures. These subgroups contain the commutator subgroups of the projective unitary groups. Specifically, the article provides conditions under which these isomorphisms are induced by and the underlying rings are connected by hermitian Morita equivalences (HMEs). This article introduces the hyperbolic length of a module as well as the concept of generalized hyperbolic modules over simple Artinian rings, and over semisimple Artinian rings with anti-structures. The article shows that the stated isomorphisms are induced by HMEs if all the following conditions hold: (a) the hermitian forms are nonsingular and trace valued; (b) the modules in question are generalized hyperbolic; (c) the hyperbolic length equals three or is greater than or equal to five (hyperbolic length is greater than or equal to five in the semisimple case). Significantly, the condition of the hyperbolic length of a module greater than or equal to m is satisfied by a set of modules larger than or equal to those satisfying the condition of the Witt index of the module greater than or equal to m. 相似文献
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In this paper the sufficient and necessary conditions are given for a formal triangular matrix ring to be right PP, generalized right PP, or semihereditary, respectively. 相似文献
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除环上矩阵乘积广义逆的逆序律 总被引:1,自引:0,他引:1
刘玉 《数学的实践与认识》2005,35(5):187-189
给出了除环上矩阵对的一种等价分解,从而分别导出了A( n) {1 }…A( 1) {1 } (A1) …A( n) ) {1 }及A( n) {1 ,2 }…A( 1) {1 ,2 } (A1) …A( n) ) {1 ,2 }的等价条件. 相似文献
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本文使用双矩阵分解方法研究除环上分块矩阵秩的等式,给出了Marsaglia-Styan公式一个新的证明并获得了一些新的秩等式的刻划. 相似文献
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设R是一个环,其上的理想包含图,记为Γ_I(R),是一个有向图,它以R的非平凡左理想为顶点,从R的左理想I_1到I_2有一条有向边当且仅当I_1真包含于I_2.环R上的理想关系图,记为Γ_i(R),也是一个有向图,它以R为顶点集,从R中元素A到B有一条有向边当且仅当A生成的左理想真包含于B生成的左理想.设F_q为有限域,其上n阶全矩阵环记为M_n(F_q),本文刻画了环M_n(F_q)上的理想包含图以及理想关系图的任意自同构. 相似文献