共查询到19条相似文献,搜索用时 46 毫秒
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设R是半素环,U是R的极大右商环,C是R的扩展型心,a,b∈U.对R上广义导子δ的值的幂零,幂中心化子问题进行了讨论,即(aδ(x))~nb=0(∈C)形式的恒等式,对δ的形式以及δ与a,b的关系做了完整的刻画,从而发展了Herstein,Brear的研究结果. 相似文献
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利用导子和triple导子的定义,刻画了特征不等于2的代数闭域上4维幂零李代数的导子和triple导子. 相似文献
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设M是包含非平凡投影P的单位素环,证明了素环M上的非线性Lie导子具有形式A→ω(A)+h(A)I,其中ω:M→M是可加的导子,h:M→C是非线性映射且对所有A,B∈M有h(AB-BA)=0. 相似文献
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Let R be a prime ring with center Z(R), I a nonzero ideal of R, d a nonzero derivation of R and 0≠a∈ R. In the present paper, our object is to study the situation a[d(xk), xk]n∈ Z(R) for all x ∈ I under certain conditions, where n(≥ 1), k(≥ 1) are fixed integers. 相似文献
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素环上导子的线性组合 总被引:1,自引:0,他引:1
In this paper we discuss the linear combination of derivations in prime rings which was initiated by Niu Fengwen.Our aim is to improve Niu‘s result.For the proof of the main theorem we generalize a result of Bresar and obtain a lemma that is of independent interest. 相似文献
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本文主要证明了以下定理:设Δ是有限连通箭图,A=kΔ/F2则A到D(A)的外导于为零的充要条件是Δ不含长度为2的圈. 相似文献
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A. Firat 《Siberian Mathematical Journal》2006,47(1):169-172
Given a prime ring R, a skew g-derivation for g : R → R is an additive map f : R → R such that f(xy) = f(x)g(y) + xf(y) = f(x)y + g(x)f(y) and f(g(x)) = g(f(x)) for all x, y ∈ R. We generalize some properties of prime rings with derivations to the class of prime rings with skew derivations. 相似文献
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Let R be a prime ring with center Z and S (?) R. Two mappings D and G of R into itself are called cocentralizing on S if D(x)x-xG(x) ∈ Z for all x ∈ S. The main purpose of this paper is to describe the structure of generalized derivations which are cocentralizing on ideals, left ideals and Lie ideals of a prime ring, respectively. The semiprime case is also considered. 相似文献
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设R是一个特征不等于2的不可交换的素环,d为R的一个导子,如果[xd,x]xd=0 对所有的x∈R都成立,那么d=0.进一步,如果对所有的x∈R,都有[[xd,x],xd]=0,那么d=0. 相似文献
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Let ? be a prime ring, 𝒞 the extended centroid of ?, ? a Lie ideal of ?, F be a nonzero generalized skew derivation of ? with associated automorphism α, and n ≥ 1 be a fixed integer. If (F(xy) ? yx) n = 0 for all x, y ∈ ?, then ? is commutative and one of the following statements holds: (1) Either ? is central; (2) Or ? ? M 2(𝒞), the 2 × 2 matrix ring over 𝒞, with char(𝒞) = 2. 相似文献
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The concept of derivations and generalized inner derivations has been generalized as an additive function δ: R→ R satisfying δ(xy) = δ(x)y xd(y) for all x,y∈R,where d is a derivation on R.Such a function δis called a generalized derivation.Suppose that U is a Lie ideal of R such that u2 ∈ U for all u ∈U.In this paper,we prove that U(C)Z(R) when one of the following holds:(1)δ([u,v]) = uov (2)δ([u,v]) uov=O(3)δ(uov) =[u,v](4)δ(uov) [u,v]= O for all u,v ∈U. 相似文献
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This article gives characterizations of generalized derivations with skew nilpotent values on noncommutative Lie ideals of a prime ring. The results simultaneously generalize the ones of Herstein, Lee and Carini et al. 相似文献
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Generalized Derivations with Nilpotent Values on Semiprime Rings 总被引:1,自引:0,他引:1
FengWEI 《数学学报(英文版)》2004,20(3):453-462
Let R be a semiprime ring, RF be its left Martindale quotient ring and I be an essential ideal of R. Then every generalized derivation μ defined on I can be uniquely extended to a generalized derivation of RE. Furthermore, if there exists a fixed positive integer n such that μ(x)^n = 0 for all x∈I, then μ=0. 相似文献
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设R是素环,I是R的非零理想,如果R容许一个非单位映射的左乘子使得对所有x,y∈I满足δ(x°y)=x°y或δ(x°y) x°y=0,那么R可交换.此外,如果R是2-扭自由的素环,U是平方封闭的李理想,γ是伴随导子非零的广义导子,B:R×R→R是迹函数为g(x)=B(x,x)的对称双导,当下列条件之一成立时U为中心李理想(1)γ同态作用于U(2)2[x,y]-g(xy) g(yx)∈Z(R)(3)2[x,y] g(xy)-g(yx)∈Z(R)(4)2(x°y)=g(x)-g(y)(5)2(x°y)=g(y)-g(x)对所有的x,y∈U. 相似文献