ON 2-ABELIAN (n – 5)-FILIFORM LIE ALGEBRAS

We classify the (n ? 5)-filiform Lie algebras which have the additional property of a non-abelian derived subalgebra. Moreover we show that if a (n ? 5)-filiform Lie algebra is characteristically nilpotent, then it must be 2-abelian.     

ON QUASI-TORAL RESTRICTED LIE ALGEBRAS

§1. IntroductionIn the theory of associative ring there are a number of known su?cient conditions forthe commutativity of an associative ring R, some in the form of a polynomial identity.For instance, it is a well-known result that if every element x of …     

ON THE DEFORMATION OF SOME LIE ALGEBRAS

Suppose (L[]) be a real or complex Lie algebra. We prove in this paper the following results, 1. Lie algebra L is semisimple, if and only if every deformation of L is semisimple; 2. when dim L=3, the nontrivial deformation of L exists if and only if dim [LL]≠3.     

ON THE COHOMOLOGY OF GENERALIZED RESTRICTED LIE ALGEBRAS

0.IntroductionThispaperisaimedatdevelopingthecohomologytheoryofmodularLiealgebrasandthendeterminingthefirstcohomologygroupsofCartantypeLiealgebras.AsgeneralizationoftheconceptofrestrictedLiealgebras,ageneralizedrestrictedLiealgebra(GRLiealgebra)wasintroducedin[21],whichisassociatedwithabasisandamappingofthebasisintotheLiealgebrasatisfyingthegeneralized-restrictednessconditions.Generalizedrestrictedrepresentations(GRrepresentations)werethenintroduced,whichcanbereducedtotherepresentationsofa…     

ON NEW SIMPLE LIE ALGEBRAS OF SHEN GUANGYU

In Shen Guangyu constructed two classes of simple Lie algebras ∑, , and proved that ∑ is new. This paper gives the invariant filtrations and the associated graded algebras of ∑, . Itfollows that is new too. Moreover, the author gives some new invariants of ∑, and refines some results of Shen Guangyu [1, 4].     

COHOMOLOGY OF GRADED LIE ALGEBRAS OF CARTAN TYPE S (n, m)

Let F be an algebraically closed field of characteristic p>3. This paper studies the cohomology of graded Lie algebras S(n,m) of Cartan type over F. The author determines the structures of H~1(S(3,m), _0), where _0 is the graded S(3,m)-module which is induced by an irreducible sl (3)-module V_0, the structures of H~1(S(3,m), V), where V is an irreducible S(3,m)-module, and the structures of the restricted cohomology H_*~1(S(3,(1, 1, 1)), V), where V is an irreducible restricted S(3, (1, 1, 1))-module.     

GRADED MODULES OF GRADED LIE ALGEBRAS OF CART AN TYPE (III) —IRREDUCIBLE MODULES

Over a field of characteristic$\[ \ne 2\]$, 3, all irreducible positive and negative graded modules of simple Lie algebras $\[L(n)\]$ and $\[L(n,m)\]$ of Cartan typs $\[W,S\]$, and H are determined. Further, all irreducible positive and negative filtered modules of $\[L(n,m)\]$ are determined.For $\[L(n)\]$, every irreducible negative filtered module is a negative graded module, but there exist irreducible positive filtered modules which are not graded.     

THE INVARIANT FORMS ON THE GRADED MODULES OF THE GRADED CARTAN TYPE LIE ALGEBRAS

This paper determines the graded modules of graded Cartan type Lie aigebras whichpossess nondegenerate invariant form.     

GRADED MODULES OF GRADED LIE ALGEBRAS OF CARTAN TYPE (Ⅲ)——IRREDUCIBLE MODULES

Over a field of characteristic≠2, 3, all irreducible positive and negative graded modulesof simple Lie algebras L(n) and L(n, m) of Cartan type W, S and H are determined.Further, all irreducible positive and negative filtered modules of L(n, m) are determined.For L,(n), every irreducible negative filtered module is a negative graded module, but thereexist irreducible positive filtered modules which are not graded.     

DECOMPOSITIONS OF BOSONIC MODULES OF LIE ALGEBRAS W_(1 ∞) AND W_(1 ∞)(gl_N)

A bosonic construction (with central charge c = 2) of Lie algebras W1 ∞and W1 ∞(glN), as well as the decompositions into irreducible modules are described. And for Wi oo, when restricted to its Virasoro subalgebra Vir, a bosonic construction and the same decomposition for Vir are obtained.     

ABOUT THE INVERSION FORMULA ON THE LIE GROUP SL (2, R)

Harish-Chandra have got a Fourier inversion formula for C_c~-(SL(2, R)). In this paper, we give a discussion on approximation identity kernels on SL(2, R) and get some properties of their Fourier transforms, and then, making use of these properties and Harish-Chandra's result, we prove that the Fourier inversion formula obtained by Harish-Chandra is also valid for C_b~3 (SL(2, R)).     

LIE ALGEBRA K(n,μj,m)OF CARTAN TYPE OF CHARACTERISTIC p=2.

Let K(n,μ_j,m),n=2r+1,denote the Lie algebra of characteristic p=2,which isdefined in [4].In the paper the restrietability of K(n,μ_j,m)is discussed and it is provedthat,when r≡1(mod 2)and r>1,1(ad.f)=n+1 if and only if 0≠f∈.Then theinvariance of some filtrations of K(n,μ_j,m)and the condition of isomorphism of K(n,μ_j,m)and K(n′,μ_j′,m′)are obtained.Besides,the generators and the derivation algebraof K(n,μ_l,m)are discussed.The results also hold,when r=0(mod 2)and r>0.     

AUTOMORPHISM GROUP OF FINITELY GENERATED FREE ALGEBRAS FV(Lκ)(n)

本文研究了自同构群AutLκ和AutFV(LK)(n)的结构问题.利用了正交模格及其自同构群的直积分解方法,获得了正交模格Lκ和自由代数FV(LK)(n)的自同构群的直积分解式.     

a_(n+1)=p(n)a_n~2+f(n)a_n+r(p(n)≠0)型数列的求解方法

数列问题的背景新颖 ,能力要求高 ,内在联系密切 ,思维方法灵活 ,因此倍受命题者的青睐 .解答数列问题要求熟练掌握数列基础知识 ,灵活运用基本数学思想方法 ,善于转化 .an+1 =p( n) .a2n+ f ( n) .an+ r ( p( n)≠0 )型数列是数列和二次函数、不等式相结合的典范 ,难度较大 .求解此类问题的思维模式是 :观察—归纳—猜想—证明 .求解的主要方法是 :分析法 ,比较法 ,消去法 ,综合法 ,放缩法 ,数学归纳法 .例 1　数列 x1 ,x2 ,… ,由 x1 =12 ,xn+1 =x2n + xn( n =1,2 ,… )给出 ,Sn与 Pn 分别是数列 y1 ,y2 ,y3 ,… ,前 n项的和与积 ,这里 y…     

an+1=p(n)a2/n+f(n)an+r(p(n)≠0)型数列的求解方法

数列问题的背景新颖,能力要求高,内在联系密切,思维方法灵活,因此倍受命题者的青睐.解答数列问题要求熟练掌握数列基础知识,灵活运用基本数学思想方法,善于转化.an+1=p(n)@a2n+f(n)@an+r(p(n)≠0)型数列是数列和二次函数、不等式相结合的典范,难度较大.求解此类问题的思维模式是:观察-归纳-猜想-证明.求解的主要方法是:分析法,比较法,消去法,综合法,放缩法,数学归纳法.     

MULTIPLIERS OF SEGAL ALGEBRAS A_p(G)

Let G be a locally compact but non-compact abelian group,It is proved thatM(A_p(G),L_1(G))=M(G)and M(A_p(G),L_1(G)∩C_0(G))=M(L_1(G),L_1(G)∩C_0(G)).If G is discrete,then M(A_p(G),L_1(G))=A_p(G),M(A_p,(G),L_1(G)∩C_0(G))=A_p(G).     

ON CRITICAL SINGULAR QUASILINEAR ELLIPTIC PROBLEM WHEN n = p

This article deals with the problem where n = p. The authors prove that a Hardy inequality and the constant (p/p-1)p is optimal. They also prove the existence of a nontrivial solution of the above mentioned problem by using the Mountain Pass Lemma.