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.

Invertible Linear Maps on the General Linear Lie Algebras Preserving Solvability

Let Mn be the algebra of all n × n complex matrices and gl（n, C） be the general linear Lie algebra, where n ≥ 2. An invertible linear map φ ： gl（n, C） → gl（n, C） preserves solvability in both directions if both φ and φ-1 map every solvable Lie subalgebra of gl（n, C） to some solvable Lie subalgebra. In this paper we classify the invertible linear maps preserving solvability on gl（n, C） in both directions. As a sequence, such maps coincide with the invertible linear maps preserving commutativity on Mn in both directions.

3D Object Recognition Based on Linear Lie Algebra Model

A surface model called the fibre bundle model and a 3D object model based on linear Lie algebra model are proposed. Then an algorithm of 3D object recognition using the linear Lie algebra models is presented. It is a convenient recognition method for the objects which are symmetric about some axis. By using the presented algorithm, the representation matrices of the fibre or the base curve from only finite points of the linear Lie algebra model can be obtained. At last some recognition results of practicalities are given.

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.

Non-Linear Semi-Quantum Hamiltonians and Its Associated Lie Algebras

We show that the non-linear semi-quantum Hamiltonians which may be expressed as(whereis the set of generators of some Lie algebra and are the classical conjugated canonical variables) always close a partial semi Lie algebra under commutation and, because of this, it is always possible to integrate the mean values of the quantum degrees of freedom of the semi-quantum non-linear system in the fashion:(whereis the Maximum Entropy Principle density operator) and, so, these kind of Hamiltonians always have associated dynamic invariants which are expressed in terms of the quantum degrees of freedom’s mean values. Those invariants are useful to characterize the kind of dynamics (regular or irregular) the system displays given that they can be fixed by means of the initial conditions imposed on the semi-quantum non-linear system.

Non-linear Invertible Maps that Preserve Staircase Subalgebras

Let g be the general linear Lie algebra consisting of all n x n matrices over a field F and with the usual bracket operation {x, y} =xy - yx. An invertible map φ ： g →g is said to preserve staircase subalgebras if it maps every staircase subalgebra to some staircase subalgebra of the same dimension. In this paper, we devote to giving an explicit description on the invertible maps on g that preserve staircase subalgebras.

一类Heisenberg-Virasoro李代数上的交换线性映射

根据交换线性映射的性质,计算秩为2的Heisenberg-Virasoro李代数上的交换线性映射,以确定此李代数的形心.

Lie可容许代数的导子

讨论了 Lie可容许代数导子的基本性质 ,并给出了导子与其自身结构及其

三角代数上Lie中心化子的刻画

设U是可交换环R上的三角代数,如果线性映射Ф:U→U,对任意的x,y∈U,当xy=0时,满足Ф([x,y])=[Ф(x),y]=[x,Ф(y)],则存在a∈Z(U)及线性映射τ:U→Z(U),使得对任意x∈U,有Ф(x)=ax+τ(x),其中τ作用在满足xy=0的交换子[x,y]为零。

Stability and Stabilization of Block-cascading Switched Linear Systems

The main purpose of this paper is to investigate the problem of quadratic stability and stabilization in switched linear systems using reducible Lie algebra. First, we investigate the structure of all real invariant subspaces for a given linear system. The result is then used to provide a comparable cascading form for switching models. Using the common cascading form, a common quadratic Lyapunov function is （QLFs） is explored by finding common QLFs of diagonal blocks. In addition, a cascading Quaker Lemma is proved. Combining it with stability results, the problem of feedback stabilization for a class of switched linear systems is solved.

Maximal subalgebras of the general linear Lie algebra containing Cartan subalgebras

Let gl,,（R） be the general linear Lie algebra of all n×n matrices over a unital commutative ring R with 2 invertible, dn（R） be the Cartan subalgebra of gln（R） of all diagonal matrices. The maximal subalgebras of gln（R） that contain dn（F：） are classified completely.

Derivations of Certain Linear Lie Algebras over Commutative Rings

Let L be the symplectic algebra or the orthogonal algebra over a commutative ring R, h the maximal torus of L consisting of all diagonal matrices in L, and b the standard Borel subalgebra of L containing h. In this paper, we first determine the intermediate algebras between h and b, then for such an intermediate algebra, we give an explicit description on its derivations, provided that R is a commutative ring with identity and 2 is invertible in R.

Mathematical Aspects of SU (2) and SO(3,R) Derived from Two-Mode Realization in Coordinate-Invariant Form

Some mathematical aspects of the Lie groups SU (2) and in realization by two pairs of boson annihilation and creation operators and in the parametrization by the vector parameter instead of the Euler angles and the vector parameter c of Fyodorov are developed. The one-dimensional root scheme of SU (2) is embedded in two-dimensional root schemes of some higher Lie groups, in particular, in inhomogeneous Lie groups and is represented in text and figures. The two-dimensional fundamental representation of SU (2) is calculated and from it the composition law for the product of two transformations and the most important decompositions of general transformations in special ones are derived. Then the transition from representation of SU (2) to of is made where in addition to the parametrization by vector the convenient parametrization by vector c is considered and the connections are established. The measures for invariant integration are derived for and for SU (2) . The relations between 3D-rotations of a unit sphere to fractional linear transformations of a plane by stereographic projection are discussed. All derivations and representations are tried to make in coordinate-invariant way.

某些交换环上2阶线性李代数的自同构

设R是一个初等因子环或局部环,并且2是R的单位,确定了特殊线性李代数sl2(R)和一般线性李代数gl2(R)的自同构.

平面控制系统的线性对称性

本文讨论了二维非线性系统在线性群作用下的对称性,及GL(2,R)的所有连通子群。换言之,本文研究了控制系统的一切可能的线性对称性。文中给出各种情况下的充分必要条件,并且对各类线性对称系统的构造给出完整的描述,从而显示了大量对称控制系统的存在性。

可换环上辛代数与一般线性李代数之间的中间李代数(英文)

本文研究了含幺可换环上一般线性李代数的子代数结构.通过构造特殊矩阵并利用这些矩阵进行计算,得到了任意含幺可换环上辛代数与一般线性李代数之间的所有中间李代数的形式.并且有利于研究可换环上相应的典型群的子群结构.

可换环上一般线性李代数在几类典型李代数中的扩代数

研究典型李代数的子代数结构,利用矩阵方法决定了含幺可换环上n级一般线性李代数分别在2n级辛代数,2n级正交代数及2n+1级正交代数中的扩代数.

环上的典型的线性李代数的理想

设Ｒ是有１的交换环，本文证明了：当ｎ＞２时，ｓｌｎ（Ｒ）的理想都是标准的．当２∈Ｒ＊，ｎ＞３时。

一类W-李代数上的双导子与交换映射

证明了一类W-李代数上的每个反对称双导子是内双导子。作为反对称双导子的一个应用,证明了在此类李代数上的每个线性交换映射形如ψ(x)=λx,其中λ∈C。

度量李代数的扩张

3-李代数在数学及数学物理的很多领域有着广泛的应用,利用李代数实现3-李代数,一直是人们关注的问题,文章主要研究利用度量李代数的维数扩张实现3-李代数.利用m-维度量李代数V及V上的线性函数f,分别做V的一维扩张与二维扩张,构造了(m+1)-维3-李代数与(m+2)-维3-李代数,并研究了3-李代数的度量结构.