诣零半交换环上的Ore扩张（英文）

本文研究诣零半交换环上的Ore扩张环的性质.利用对多项式的逐项分析方法,我们证明了:设α是环R上的一个自同态,δ是环R上的一个α-导子.如果R是(α,δ)-斜Armendariz的(α,δ)-compatible环,则R[x;α,δ]是诣零半交换环当且仅当环R是诣零半交换环;如果R是诣零半交换的(α,δ)-compatible环,则R[x;α,δ]是斜Armendariz环.所得结果推广了近期关于斜多项式环的相关结论.     

Zip模的扩张（英文）

本文主要证明了:(1)如果右R-模MR是(α,δ)-compatible且(α,δ)-Armendariz,则右R[x;α,δ]-模M[x]是zip模当且仅当右R-模MR是zip模;(2)如果(S,)是可消无挠严格序幺半群且M_R是S-Armendariz模,则右[[R~S,]]-模[[M~S,]]_([[R~S,]]是zip模当且仅当右R-模M_R是zip模;(3)如果M_R是reduced且σ-compatible模,G为序群,则Malcev-Neumann环R*((G))上模M*((G))_(R*((G)))是zip模当且仅当右R-模M_R是zip模;因此一些文献中关于zip环与zip模的部分结论可以看作是本论文相关结论的推论.     

诣零半交换环上的Ore扩张

本文研究诣零半交换环上的Ore扩张环的性质.利用对多项式的逐项分析方法,我们证明了:设α是环R上的一个自同态,δ是环R上的一个α-导子.如果R是(α,δ)-斜Armendariz的(α,δ)-compatible环,则R[x;α,δ]是诣零半交换环当且仅当环R是诣零半交换环;如果R是诣零半交换的(α,δ)-compatible环,则R[x;α,δ]是斜Armendariz环.所得结果推广了近期关于斜多项式环的相关结论.     

广义线性McCoy环

称环R是右线性McCoy的,如果R[x]中非零线性多项式f（x）,g（x）满足I（x）g（x）=0,则存在非零元素r∈R使得f（x）r=0．设a是环R的自同态,通过用斜多项式环R[x;a]中的元素代替一般多项式环R[x]中的元素而引入a-线性McCoy环的概念．讨论了a-线性McCoy环的基本性质和扩张性质．     

关于环自同态的相对McCoy性质（英文）

本文引入了α-McCoy环和弱α-McCoy环的概念分别研究了一个环R关于其自同态α的McCoy性质和弱McCoy性质,利用各种环扩张,证明了一个环R是α-McCoy环当且仅当R[x]是α-McCoy环,得到了正向系上弱α-McCoy环的正向极限是弱α-McCoy环,推广和改进了McCoy环在矩阵环和多项式上的相关结论.     

斜三角矩阵环的强可逆性和弱刚性

设σ是环R的一个自同态,δ是R的一个σ-导子.研究斜三角矩阵环T_n(R,α)的强可逆性和(σ,δ)-弱刚性,证明了1)若α是环R的一个刚性自同态,则环R是强可逆环当且仅当T_n(R,α)是强可逆环;2)若α和σ都是环R的刚性自同态,ασ=σα,且R是δ-弱刚性环,则R是(σ,δ)-弱刚性环当且仅当T_n(R,α)是(σ,δ)-弱刚性环.     

(α,δ)-弱刚性环上的Ore扩张（英文）

本文研究(α,δ)-弱刚性环上的Ore扩张环R[x;α,δ]的弱对称性、弱zip性、幂零p.p.性和幂零Baer性.利用对多项式的逐项分析的方法,证明了如果R是(α,δ)-弱刚性环和半交换环,则Ore扩张环R[x;α,δ]是弱对称的(弱zip的,幂零p.p.的,幂零Baer的)当且仅当R是弱对称的(弱zip的,幂零p.p.的,幂零Baer的).这些结果统一和扩展了前面已有的相关结论.     

M-McCoy环和M-Armendariz环的多项式扩张

研究非交换环上的相对于幺半群的McCoy环和Armendariz环的多项式扩张.对于包含无限循环子幺半群的交换可消幺半群M,证明了若R是M-McCoy（或M-Armendariz）环,则R上的洛朗多项式环R[x,x-1]是M-McCoy（或M-Armendariz）环.     

具有对称自同态与对称导子的环（英文）

本文研究具有对称自同态和对称导子的环.利用性质nil(R[x])=nil(R)[x],我们证明了:如果R是弱2-primal环,则R是弱对称(σ,δ)-环当且仅当R[x]是弱对称(ˉσ,ˉδ)-环.本文结论拓展了关于对称环和弱对称环的研究.     

对称环的扩张

本文首先考虑了对称环的性质和基本的扩张．其次讨论了几种多项式环的对称性,且证明了:如果R是约化环,则R[x]／(xn)是对称环,其中(xn)是由xn生成的理想,n是一个正整数．最后证明了:对一个右Ore环R,R是对称环当且仅当R的古典右商环Q是对称环．     

右对称环

本文在左对称环的基础上提出了右对称环的概念,分别给出了是右对称环但不是左对称环和是左对称环但不是右对称环的例子．证明了（1）如果R是Armendariz环,则R是右对称环的充要条件R[x]是右对称环;（2）如果R是约化环,则R[x]/（x^n）是右对称环,其中（xn）是由xn生成的理想．     

On CS Rings and QF Rings

In this paper, we shall discuss the conditions for a right SC right CS ring to be a QF ring. In particular, we prove that if R is a right SI right CS ring satisfying the reflexive orthogonal condition (*) and if every CS right R-module is -CS, then R is a QF ring.AMS Subject Classification (1991): 16L30 16L60     

Strong Cleanness of Matrix Rings Over Commutative Rings

Let R be a commutative local ring. It is proved that R is Henselian if and only if each R-algebra which is a direct limit of module finite R-algebras is strongly clean. So, the matrix ring 𝕄 _n (R) is strongly clean for each integer n > 0 if R is Henselian and we show that the converse holds if either the residue class field of R is algebraically closed or R is an integrally closed domain or R is a valuation ring. It is also shown that each R-algebra which is locally a direct limit of module-finite algebras, is strongly clean if R is a π-regular commutative ring.     

Ideal-Symmetric and Semiprime Rings

Lambek extended the usual commutative ideal theory to ideals in noncommutative rings, calling an ideal A of a ring R symmetric if rst ∈ A implies rts ∈ A for r, s, t ∈ R. R is usually called symmetric if 0 is a symmetric ideal. This naturally gives rise to extending the study of symmetric ring property to the lattice of ideals. In the process, we introduce the concept of an ideal-symmetric ring. We first characterize the class of ideal-symmetric rings and show that this ideal-symmetric property is Morita invariant. We provide a method of constructing an ideal-symmetric ring (but not semiprime) from any given semiprime ring, noting that semiprime rings are ideal-symmetric. We investigate the structure of minimal ideal-symmetric rings completely, finding two kinds of basic forms of finite ideal-symmetric rings. It is also shown that the ideal-symmetric property can go up to right quotient rings in relation with regular elements. The polynomial ring R[x] over an ideal-symmetric ring R need not be ideal-symmetric, but it is shown that the factor ring R[x]/xⁿR[x] is ideal-symmetric over a semiprime ring R.     

环的几种内射性的关系

我们研究了关于广义自内射环(P-内射环,GP-内射环,AP-内射环,单内射环,n-内射环)的一些关系.     

具有一对零态射的Morita Context 环(Ⅱ)

设(A,B,V,W,ψ,φ)是一个Morita Context,具有一对零态射ψ=0,φ=0,C= (A V W B)是对应的Morita Context环.本文给出了C与A,B,V,W之间关于环的π-正则性、semiclean性、Mophic性和环的Exchgange性、Potent性、GM性的关系.     

Armendariz group rings

For a torsion or torsion-free group G and a field F, we characterize the group algebra FG that is Armendariz. Armendariz property for a group ring over a general ring R is also studied and related to those of Abelian group rings and the quaternion ring over R.     

Symplectic algebras and poisson algebras

Abstract

A ring R is called left P-injective if for every a ∈ R, aR = r(l(a)) where l( ? ) and r( ? ) denote left and right annihilators respectively. The ring R is called left GP-injective if for any 0 ≠ a ∈ R, there exists n > 0 such that a ⁿ  ≠ 0 and a ⁿ R = r(l(a ⁿ )). As a response to an open question on GP -injective rings, an example of a left GP-injective ring which is not left P-injective is given. It is also proved here that a ring R is left FP -injective if and only if every matrix ring 𝕄 _n (R) is left GP-injective.     

The McCoy Condition on Ore Extensions

Nielsen [29 Nielsen , P. P. ( 2006 ). Semi-commutativity and the McCoy condition . J. Algebra 298 : 134 – 141 .[Crossref], [Web of Science ®] , [Google Scholar]] proved that all reversible rings are McCoy and gave an example of a semicommutative ring that is not right McCoy. When R is a reversible ring with an (α, δ)-condition, namely (α, δ)-compatibility, we observe that R satisfies a McCoy-type property, in the context of Ore extension R[x; α, δ], and provide rich classes of reversible (semicommutative) (α, δ)-compatible rings. It is also shown that semicommutative α-compatible rings are linearly α-skew McCoy and that linearly α-skew McCoy rings are Dedekind finite. Moreover, several extensions of skew McCoy rings and the zip property of these rings are studied.