广义Poisson超代数的同调与上同调群

给出了广义Poisson超代数的同调和上同调群的基本性质.特别是,通过Hochschild上同调以及长正合列,建立了广义Poisson超代数上同调群的理论,刻画了这种代数的低阶上同调群.最后,决定了5-正合列以及它的泛中心扩张的核.     

广义仿射李代数上的非交换Poisson代数结构

非交换的Poisson代数同时具有(未必交换的)结合代数和李代数两种代数结构,且结合代数和李代数之间满足所谓的Leibniz法则.本文确定了一般广义仿射李代数上所有的Poisson代数结构.     

李Poisson超代数的泛中心扩张

研究了李Poisson超代数的泛中心扩张问题.通过构造其泛中心扩张,得到了其存在泛覆盖的充要条件是李Poisson超代数是完全的,并对李Poisson超代数的自同构群及导子的提升给出了结果.     

广义Weyl型李代数Wgl_n(F)上的2-上同调群

设F是一特征为零的域,W是F上的广义Weyl代数,gl_n(F)为F上的一般线性李代教,则结合代数Wgl_n(F)上具有一个诱导的李代数结构,本文讨论了李代数Wgl_n(F)的2-上同调群的结构.     

对偶扩张代数的Hochschild上同调群

本文利用组合的方法得到了遗传代数与l-遗传代数的对偶扩张的Hochschild 上同调群的维数方程的计算公式．     

截面代数的Hochschild上同调群

用代数表示论中方法给出了截面代数的Hochschild上同调群与其Gabriel箭图的组合性质之间的关系。     

l-遗传代数的Hochschild上同调群

设 $\Lambda$ 是域$k$上的有限维代数. 则 $\Lambda$的低阶 Hochschild上同调群在有限维代数的表示理论中扮演着重要的角色. 该文得到了 $l$ -遗传代数的一阶和二阶Hochschild 上同调群的维数方程.     

一个导子李代数的二阶上同调群

Gelfand和Fuks曾计算过圆上向量场李代数的上同调。作者计算了微分算子代数上的2-上循环。本文的目的是计算多元Laurent多项式环上的导子李代数上的二阶上同调群,把[1]的讨论推广到多元的情形。 设C[t_1,t_2,t_1~(-1),t_2~(-1)]是复数域C上的二元Laurent多项式环[t_1,t_2,t_1~(-1),t_2~(-1)]是C[t_1,t_2,t_1~(-1),t_2~(-1)]上的导子作成的李代数,其中,·有基{t_1~ml+~1t_2~m2D_1,t_1~mlt_心~m2~(+1) D_2|m_1,m_2∈Z)。     

Z_n分次代数的Hochschild上同调群

本文给出了Z_n分次代数A的Hochschild上同调群的定义,对低阶Hochschild上同调群进行了刻画.利用第一阶Hochschild上同调群给出了Z_n分次代数为分次可分代数的充要条件,证明了第二阶Hochschild上同调群的零次分支与A的Hochschild扩张之间的一一对应关系.     

Zeroth Poisson Homology,Foliated Cohomology and Perfect Poisson Manifolds

We prove that, for compact regular Poisson manifolds, the zeroth homology group is isomorphic to the top foliated cohomology group, and we give some applications. In particular, we show that, for regular unimodular Poisson manifolds, top Poisson and foliated cohomology groups are isomorphic. Inspired by the symplectic setting, we define what a perfect Poisson manifold is. We use these Poisson homology computations to provide families of perfect Poisson manifolds.     

Relative Cohomology and Generalized Tate Cohomology

We compare relative cohomology theories arising from using different proper resolutions of modules. Criteria for the vanishing of such distinctions are given in certain cases, and we show that this is related to the generalized Tate cohomology theory. We also demonstrate that the two balance properties admitted by the two different cohomology theories are actually equivalent in some cases. As applications, we recover many results obtained earlier in various contexts. At last we investigate derived functors with respect to the Auslander and Bass classes.     

Extended Local Cohomology and Local Homology

We present an in-depth exploration of the module structures of local (co)homology modules (moreover, for complexes) over the completion \(\widehat {R}^{\mathcal {a}}\) of a commutative noetherian ring R with respect to a proper ideal \(\mathcal {a}\). In particular, we extend Greenlees-May Duality and MGM Equivalence to track behavior over \(\widehat {R}^{\mathcal {a}}\), not just over R. We apply this to the study of two recent versions of homological finiteness for complexes, and to certain isomorphisms, with a view toward further applications. We also discuss subtleties and simplifications in the computations of these functors.     

First Space Cohomology of the Orthosymplectic Lie Superalgebra in the Lie Superalgebra of Superpseudodifferential Operators

We investigate the first cohomology space associated with the embedding of the Lie Orthosymplectic superalgebra $\mathfrak{osp}(n|2)$ on the (1,n)-dimensional superspace ?^1|n in the Lie superalgebra $ \mathcal{S}\Psi\mathcal{DO}(n)$ of superpseudodifferential operators with smooth coefficients, where n?=?0, 1, 2. Following Ovsienko and Roger, we give erxplicit expressions of the basis cocycles.     

Cohomology of a Poisson Algebra

We propose a technique for calculating the cohomology of a Poisson algebra using the Laplace transformation of distributions with compact support. We find the lowest-order cohomologies of this algebra with coefficients in two natural representations: the trivial and the adjoint representations.     

Cohomologies of the Poisson Superalgebra [Erratum]

In S. E. Konstein, A. G. Smirnov, and I. V. Tyutin “Cohomologies of the Poisson superalgebra” (Vol. 143, No. 2, May, 2005) on page 628, the second line in Theorem 1.3 should be: “and let .”The Editorial Board apologizes for this error.     

Generalized Poisson Functionals

Summary With the aim of treating nonlinear systems with inputs being discrete and outputs being generalized functions, generalized Poisson functional are defined and analysed, where the-transforms and the renormalizational play essential roles. For Poisson functionals, the differential operators with respect to a Poisson white noise (t), their adjoint operators and the multiplication operators by (t) are defined. Since these operators involve the time parameter explicitly, they can be used to obtain information concerning the Poisson functional at each point in time. As an example, a new method for measuring the Wiener kernels of such functionals is outlined.