A Class of Simple Modules for Electrical Lie Algebra of Type D_(5)

The simple modules for electrical Lie algebra of type D5 were investigated.The sufficient and necessary criteria of the simple Z-graded highest weight modules were established by means of determining the singular vectors of the Verma modules.The simple highest weight module is isomorphic to either that for the symplectic Lie algebra sp4 or Verma module.

Co-splitting of Simple Lie Algebras of Type A, D, E

In this paper, through a meticulous description of finite root system,a concrete comultiplication with an explicit action on the basis elements of finitedimensional simple Lie algebras of type A; D; E is constructed. Then any finitedimensional simple Lie algebra of type A; D; E is endowed with a new generalizedLie coalgebra splitting. This construction verifies the known existence of a co-splitLie structure on any finite dimensional complex simple Lie algebra.

Non-linear Maps on Borel Subalgebras of Simple Lie Algebras Preserving Abelin Ideals

Let g be a complex simple Lie algebra of rank ι, b the standard Borel subalgebra. An invertible map on Ь is said to preserve abelian ideals if it maps each abelian ideal to some such ideal of the same dimension. In this article, by using some results of Chevalley groups, the theory of root systems and root space decomposition, the author gives an explicit description on such maps of Ь.

Linear Commuting Maps on Parabolic Subalgebras of Finite-dimensional Simple Lie Algebras

A map φ on a Lie algebra g is called to be commuting if [φ(x), x] = 0 for all x ∈ g. Let L be a finite-dimensional simple Lie algebra over an algebraically closed field F of characteristic 0, P a parabolic subalgebra of L. In this paper, we prove that a linear mapφon P is commuting if and only if φ is a scalar multiplication map on P.

The Direct Sum Decomposition of Type G_2 Lie Algebra

This article mainly discusses the direct sum decomposition of type G_2 Lie algebra, which, under such decomposition, is decomposed into a type A_1 simple Lie algebra and one of its modules. Four theorems are given to describe this module,which could be the direct sum of two or three irreducible modules, or the direct sum of weight modules and trivial modules, or the highest weight module.

The Realization of 4-dimensional 3-Lie Algebras

In this paper, we mainly investigate the realization of 3-Lie algebras from a family of Lie algebras. We prove the realization theorem, offer a concrete example realizing all type of 4-dimensional 3-Lie algebras, and also give some properties about semi-simple n-Lie algebras.

关于n-Lie代数的几个注记

在Lie代数的研究中 ,半单Lie代数是主要研究对象 ,在n -Lie代数中 ,人们试图将半单n -Lie代数放在同样位置去讨论 ,并希望得到像半单Lie代数那样好的结果 ,将举例说明 ,半单n -Lie代数并不具有半单Lie代数所具有的性质 ,半单Lie代数是单理想直和 ,半单Lie代数的导子是内导子 。

有限维单李代数的伴随表示分解

利用有限维单李代数根空间分解,给出复数域上有限维单李代数的根链;利用复数域上不可约sl(2,C)-模的分类,给出有限维单李代数g在伴随作用下分解成g的不可约sl(2,C)-子模直和的分解式.

关于n-Lie代数的一些结果(英文)

研究了n + 1维n -Lie代数的一些性质 ,证明了当dim[A ,… ,A]>1时 ,A的Cartan子代数的维数是n - 1,且证明了n + 2维n -Lie代数A是单的当且仅当A不含 1维理想且A =[A ,… 。

单扩张型Lie Rinehart代数的分类定理

定义单扩张型Lie Rinehart代数,从而给出一种通过导子构造Lie Rinehart代数的途径.指出这是一种特殊的作用Lie Rinehart代数.在系数环是没有零因子的交换代数的前提下,给出单扩张型Lie Rinehart代数的完全分类定理.特别的,证明多项式环上的任何非平凡作用Lie Rinehart代数必然是单扩张型的,并给出其标准型.

A class of simple Lie algebras attached to unit forms

Abstract Let n ≥ 3. The complex Lie algebra, which is attached to a unit form xixj and defined by generators and generalized Serre relations, is proved to be a finite-dimensional simple Lie algebra of type A~, and realized by the Ringel-Hall Lie algebra of a Nakayama algebra of radical square zero. As its application of the realization, we give the roots and a Chevalley basis of the simple Lie algebra.

Multiplicity-Free Gradings on Semisimple Lie and Jordan Algebras and Skew Root Systems

A G-grading on an algebra, where G is an abelian group, is called multiplicityfree if each homogeneous component of the grading is 1-dimensional. We introduce skew root sys tems of Lie type and skew root systems of Jordan type, and use them to cons true t multiplicity-free gradings on semisimple Lie algebras and on semisimple Jordan algebras respectively. Under certain conditions the corresponding Lie (resp., Jordan) algebras are simple. Two families of skew root systems of Lie type (resp., of Jordan type) are constructed and the corresponding Lie (resp., Jordan) algebras are identified. This is a new approach to study abelian group gradings on Lie and Jordan algebras.

Simple algebras of Weyl type

Over a fieldF of arbitrary characteristic, we define the associative and the Lie algebras of Weyl type on the same vector spaceA[D] =A?F[D] from any pair of a commutative associative algebra,A with an identity element and the polynomial algebraF[D] of a commutative derivation subalgebraD ofA We prove thatA[D], as a Lie algebra (modulo its center) or as an associative algebra, is simple if and only ifA isD-simple andA[D] acts faithfully onA. Thus we obtain a lot of simple algebras.

Block型Lie超代数上的非权单模

本文研究Block型Lie超代数S(q)上的一类非权模.本文构造和分类了Ramond-Block代数上秩为1的U(η)-自由模和Neveu-Schwarz-Block代数上秩为2的U(h)-自由模.同时也给出上述两类模成为单模的充要条件,并决定了它们的同构类.本文中的结果包含了一些已有结果.

李代数L(Z,f,δ)的特殊性质

研究一类特殊的无限维李代数．利用系数矩阵和极大项,证明了这类李代数是半单李代数且没有二维交换子代数．

一类Cartan型余分裂李代数的例子

研究了正特征域上的一类Cartan型单李代数,得到了这类李代数的余分裂结构,同时得到了一类非半单的余分裂李代数.这一结果无法使用Carsimir算子方法得到.

非余分裂的弱余分裂李代数

证明了复数域C上的五维李代数L=sl_2+M不是余分裂李代数,从而证明了弱余分裂李代数不一定是余分裂李代数.

一类推广的Virosoro-like李代数

推广了Virosoro-like李代数,并构造了此类李代数的理想,同构、同态,并对其性质作了探讨.

U(g)的极小生成元和生成关系

设g是有限维单李代数,U(g)是g的普遍包络代数,从g可由两个元素生成出发,解决了U(g)的极小生成问题,证明了U(g)由a,h,1这3个元素生成,其中a,h∈g.

具有交换幂零根基的单完备李代数

给出了复数域上有限维Ｈｅｉｓｅｎｂｅｒｇ代数Ｈ的导子李代数ＤｅｒＨ，并证明了ＤｅｒＨ为一个具有交换幂零根基的单完备李代数。