广义Weyl超代数的导子

本文研究一类非阶化非线性李超代数的导子，利用阶化方法研究非阶化问题，确定了一类weyi型结合及李超代数的导子代数．在一般情况下并非所有的导子都是内导子．     

关于广导算子的零空间

本文讨论了两类广义导算子δＡＢ（ｘ）＝Ａｘ－ｘＢ和τＡＢ（ｘ）ＡｘＢ－Ｘ，并给出了一些成立的充分必要条件     

GENERALIZED DERIVATIONS ON PARABOLIC SUBALGEBRAS OF GENERAL LINEAR LIE ALGEBRAS

Let P be a parabolic subalgebra of a general linear Lie algebra gl(n, F) over a field F, where n ≥ 3, F contains at least n different elements, and char(F) = 2. In this article, we prove that generalized derivations, quasiderivations, and product zero derivations of P coincide, and any generalized derivation of P is a sum of an inner derivation, a central quasiderivation, and a scalar multiplication map of P. We also show that any commuting automorphism of P is a central automorphism, and any commuting derivation of P is a central derivation.     

THE RANGES OF ADDITIVE MAPS IN GENERALIZED FUNCTIONAL IDENTITIES ON PRIME RINGS

ABSTRACT

In the present paper we prove that a conjecture proposed by Bre?ar is true. According to Chebotar's result we generalize the conjecture.     

具有对称自同态与对称导子的环

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(σ,δ) -环. 本文结论拓展了关于对称环和弱对称环的研究.     

ON CERTAIN SUBGROUPS OF PRIME RINGS WITH DERIVATIONS

Let R be a noncommutative prime ring and let d be a nonzero derivation on R. A classical theorem of Posner asserts that the subset {[x ^d , x]|x ∈ R} is not contained in the center of R. Under the additional assumption that char R ≠ 2 and d ³ ≠ 0, we show that the additive subgroup of R generated by the subset {[x ^d , x] | x ∈ R} contains a noncentral Lie ideal of R.     

交换环上严格上三角矩阵的广义李三导子(英文)

本文研究了交换环R上所有n×n严格上三角矩阵构成的李代数N(n,R)(n≥5)上广义李三导子.利用矩阵技巧,证明了N(n,R)(n≥5)上任意广义李三导子为一李三导子与一位似映射的和.对于N(n,R)(n≥3)上广义李导子,得出类似结果.     

带广义偏序约束的Flow—shop排序问题

本文研究了一种新的排序问题：带“广义偏序”约束的ｆｏｌｗ－ｓｈｐｏ排序问题。如工件Ｊｊ与工件Ｊｋ之间有广义偏序，则Ｊｊ→Ｊｋ，且Ｊｊ的完工时间与Ｊｋ的开工时间的间隔洋小于ｌｊｋ和不大于ｕｊｋ，０≤ｌｊｋ≤ｕｊｋ。问题的目标函数是最大完工时间。     

涉及Euler数、Bernoulli数和推广的第一类Stirling数的一些恒等式

利用递推关系把文［１］、［２］中的有关结论推广到一般情形，建立起涉及Ｅｕ－ｌｅｒ数、Ｂｅｒｎｏｕｌｉ数和推广的第一类Ｓｔｉｒｌｉｎｇ数的一些恒等式．     

态射的广义逆与等化子

本文以态射偶的等化子为工具研究态射的广义逆，对于态射f，给出了g为f^-,f^D和f^ 的充要条件，并在矩阵范畴中建立了齐次线性方程组解与等化子的关系。     

具有核的态射广义Moore-Penrose逆

本文研究了具有核的态射广义Moore-Penrose逆.利用加边态射的可逆性,获得了态射广义Moore-Penrose逆存在的一些新的充要条件及相关表达式,推广了态射Moore-Penrose逆的相应结论.     

HIGHER DERIVATIONS OF SEMIPRIME RINGS

ABSTRACT

In this paper we study higher derivations of prime and semiprime rings satisfying linear relations. We extend several results known for algebraic derivations, and we prove some other results.     

含脉冲广义Emden-Fowler微分方程的正解

本文证明了一类含脉冲奇异微分方程边值问题正解存在的充要性条件,推广了已 有的某些结果.     

ETALE DESCENT OF DERIVATIONS

We study étale descent of derivations of algebras with values in a module. The algebras under consideration are twisted forms of algebras over rings, and apply to all classes of algebras, notably associative and Lie algebras, such as the multiloop algebras that appear in the construction of extended affine Lie algebras. The main result is Theorem 2.7.     

带障碍的广义插值样条与带状态约束的最优控制

本文由样条的极值性质出发给同分算子插值样条（即广义插值样条）新的推导方法。用这种方法可推导出带障碍（即带不等式约束）的微分算子插值样条的解析性质,为简便计,本文以非负广义插值样条为例。最后,揭示了状态带不等式的最优控制解的必要性准则与带障碍的广义插值样条的联系。