在 Yetter-Drinfel'd范畴中ρ-Lie代数的可解理想结构

在 Ｙｅｔｔｅｒ－Ｄｒｉｎｆｅｌ’ｄ范畴中,本文研究了ρ－Ｌｉｅ代数的可解理想结构,得到了：如果Ｌ是一个 Ｈ－单的 ρ－Ｌｉｅ代数而且 Ｖ ［Ｌ,Ｌ］ρ是［Ｌ,Ｌ］ρ的一个 ρ－Ｌｉｅ理想满足 Ｖ≠［Ｌ,Ｌ］ρ那么 Ｖ是［Ｌ,Ｌ］ρ的一个可解ρ－Ｌｉｅ子代数．     

完备Lie代数的若干进展

近十年来，特别是近几年完备Ｌｉｅ代数的研究取得了许多进展，本文分以下六个方面介绍这一领域的研究状况，０）引言；１）完备Ｌｉｅ代数的分解和唯一性；２）一些完备Ｌｉｅ代数。３）可解完备Ｌｉｅ代数；４）完备Ｌｉｅ代数的极大环面子代数，Ｋｉｌｌｉｎｇ型及结构；５）一些公开问题。     

单的完备Lie代数

给出了一个Ｈｅｉｓｅｎｂｅｒｇ代数与一个交换Ｌｉｅ代数的直和ｇ０的全形ｈ（ｇ０）和ｈ（ｇ０）的导子代数Ｄｅｒｈ（ｇ０）．证明了ｈ（ｇ０）不是一个完备Ｌｉｅ代数，但Ｄｅｒｈ（ｇ０）是一个单完备Ｌｉｅ代数．     

完备Lie代数的极大环面子代数

本文讨论有限维复完备Ｌｉｅ代数的极大环面子代数的性质，尤其是它与Ｃａｒｔａｎ子代数一致时，给出了完备Ｌｉｅ代数的若干性质．     

关于完备限制李超代数

我们分别给出了完备限制李超代数和强完备限制李超代数的一个充分必要条件,同时得到了一些完备限制李超代数的重要性质.     

关于超自反算子代数

本文讨论了超自反算子代数的等价条件及超自反性在张量积、直和、同构、约化中的不变性，改进加深了孙善利＾［２］的结果，并证明了两类Ｖｏｎ Ｎｅｕｍａｎｎ代数的超自反性。     

Tame遗传代数导出的 Lie代数

设Ａ是有限域ｋ上的有限维ｔａｍｅ遗传代数,Ｘ,Ｙ, Ｍ是有限生成Ａ模,如果Ｘ,Ｙ不可分解,证明了存在 Ｈａｌｌ多项式ＧＭＸＹ．设 Ｌ（Ａ）是以有限生成不可分解模为基的自由 Ａｂｅｌ群,则 Ｌ（Ａ）是退化 Ｒｉｎｇｅｌ－Ｈａｌｌ代数 Ｈ（Ａ）１的 Ｌｉｅ子代数,设 Ｌ’（Ａ）是 Ｌ（Ａ）的由单模生成的 Ｌｉｅ子代数,ｍ是齐次正则单模的长度,证明了当 Ｍ不可分解且ｍ不整除 Ｍ的长度时,［Ｍ］∈ Ｌ’（Ａ） ｚ Ｑ．     

三角Hopf代数表示范畴上的Lie余代数

本文在三角Ｈｏｐｆ代数表示范畴上系统地研究了Ｌｉｅ余代数,在此范畴上 的Ｌｉｅ余代数与Ｈｏｐｆ代数之间建立了重要的联系．主要给出了Ｌｉｅ余代数的余包络 余代数的结构．所得结果自然是关于Ｌｉｅ代数的对偶结果,推广了 Ｓｗｅｅｄｌｅｒ Ｍ． Ｅ．, Ｇｕｒｅｖｉｃｈ Ｄ．Ｉ．, Ｍｉｃｈａｅｌｉｓ Ｗ．和 Ｍａｉｉｄ Ｓ．等人的结果．     

三角Hopf代数表示范畴上的Lie余代数

本文在三角Ｈｏｐｆ代数表示范畴上系统地研究了Ｌｉｅ余代数,在此范畴上 的Ｌｉｅ余代数与Ｈｏｐｆ代数之间建立了重要的联系．主要给出了Ｌｉｅ余代数的余包络 余代数的结构．所得结果自然是关于Ｌｉｅ代数的对偶结果,推广了 Ｓｗｅｅｄｌｅｒ Ｍ． Ｅ．, Ｇｕｒｅｖｉｃｈ Ｄ．Ｉ．, Ｍｉｃｈａｅｌｉｓ Ｗ．和 Ｍａｉｉｄ Ｓ．等人的结果．     

Weyl型单代数

对于任意特征的域F上具有单位元的交换结合代数A和它的交换导子的子空间D的多项式代数F［Ｄ］,在张量空间A［Ｄ］=AÄF［Ｄ］中定义了Weyl型结合代数和Lie代数.证明了A［Ｄ］作为Lie代数(模去中心)或结合代数是单的充要条件是A为D-单的并且A［Ｄ］在A上的作用是忠实的.[KG*2]由此可构造出许多单代数.     

Hom-Leibniz Superalgebras

We gived the definition of Hom-Leibniz superalgebra and studied its basic properties. In particular, the derivations of Hom-Leibniz Superalgebras are portrayed in detail.     

关于p-幂零限制李超代数

我们讨论了p-幂零限制李超代数的一些性质，分别给出了p-幂零和幂零限制李超代数的几个充分必要条件，并讨论了幂零与p-幂零之间的关系．最后，证明了幂零限制李超代数的一些性质．     

The Lie Algebras in which Every Subspace s Its Subalgebra

In this paper, we study the Lie algebras in which every subspace is its subalgebra (denoted by HB Lie algebras). We get that a nonabelian Lie algebra is an HB Lie algebra if and only if it is isomorphic to g+Cidg, where g is an abelian Lie algebra. Moreover we show that the derivation algebra and the holomorph of a nonabelian HB Lie algebra are complete.     

The Lie Algebras in which Every Subspace Is Its Subalgebra

In this paper, we study the Lie algebras in which every subspace is its subalgebra (denoted by HB Lie algebras). We get that a nonabelian Lie algebra is an HB Lie algebra if and only if it is isomorphic to $g\dot{+}\mathbb{C}id_g$, where $g$ is an abelian Lie algebra. Moreover we show that the derivation algebra and the holomorph of a nonabelian HB Lie algebra are complete.     

Poisson manifolds with compatible pseudo-metric and pseudo-Riemannian Lie algebras

In a previous paper (C. R. Acad. Sci. Paris Sér. I 333 (2001) 763–768), the author introduced a notion of compatibility between a Poisson structure and a pseudo-Riemannian metric. In this paper, we introduce a new class of Lie algebras called pseudo-Riemannian Lie algebras. The two notions are closely related: we prove that the dual of a Lie algebra endowed with its canonical linear Poisson structure carries a compatible pseudo-Riemannian metric if and only if the Lie algebra is a pseudo-Riemannian Lie algebra. Moreover, the Lie algebra obtained by linearizing at a point a Poisson manifold with a compatible pseudo-Riemannian metric is a pseudo-Riemannian Lie algebra. We also give some properties of the symplectic leaves of such manifolds, and we prove that every Poisson manifold with a compatible Riemannian metric is unimodular. Finally, we study Poisson Lie groups endowed with a compatible pseudo-Riemannian metric, and we give the classification of all pseudo-Riemannian Lie algebras of dimension 2 and 3.     

Conformal biderivations of loop W (a,b) Lie conformal algebra

We study conformal biderivations of a Lie conformal algebra. First, we give the definition of a conformal biderivation. Next, we determine the conformal biderivations of loop W(a, b) Lie conformal algebra, loop Virasoro Lie conformal algebra, and Virasoro Lie conformal algebra. Especially, all conformal biderivations on Virasoro Lie conformal algebra are inner conformal biderivations.     

Flat Nonunimodular Lorentzian Lie Algebras

A flat Lorentzian Lie algebra is a left symmetric algebra endowed with a symmetric bilinear form of signature (?, +,…, +) such that left multiplications are skew-symmetric. In geometrical terms, a flat Lorentzian Lie algebra is the Lie algebra of a Lie group with a left-invariant Lorentzian metric with vanishing curvature. In this article, we show that any flat nonunimodular Lorentzian Lie algebras can be obtained as a double extension of flat Riemannian Lie algebras. As an application, we give all flat nonunimodular Lorentzian Lie algebras up to dimension 4.     

SUPERSYMMETRIC INVARIANCE AND UNIVERSAL CENTRAL EXTENSIONS OF LIE SUPERTRIPLE SYSTEMS

In this article, we discuss some properties of a supersymmetric invariant bilinear form on Lie supertriple systems. In particular, a supersymmetric invariant bilinear form on Lie supertriple systems can be extended to its standard imbedding Lie superalgebras. Furthermore, we generalize Garland＇s theory of universal central extensions for Lie supertriple systems following the classical one for Lie superalgebras. We solve the problems of lifting automorphisms and lifting derivations.     

Restricted Lie 2-algebras

In this article, we introduce the notions of restricted Lie 2-algebras and crossed modules of restricted Lie algebras, and give a series of examples of restricted Lie 2-algebras. We also construct restricted Lie 2-algebras from A(m)-algebras, restricted Leibniz algebras, restricted right-symmetric algebras. Finally, we prove that there is a one-to-one correspondence between strict restricted Lie 2-algebras and crossed modules of restricted Lie algebras.