单位球上线性不变族的偏差定理

若Ｓ为 ｎ中的单位球Ｂｎ上的线性不变族，ｆ∈Ｓ，本文给出Ｔｒ（Ｊｆ（ｚ）Ｊｆ（ｚ））的估计，这里Ｊｆ（ｚ）为ｆ的Ｊａｃｏｂｉ矩阵，也给出了ｄｅｔ（Ｊｆ（ｚ）Ｊｆ（ｚ））的估计的一个新证明．若Ｓ为Ｂｎ上的正规化双全纯凸映照，ｆ∈Ｓ；还给出了ｆ的共变导数的估计．     

Fuzzy格的F—同态与W—理想（Ⅰ）

本文讨论了Ｆｕｚｚｙ格的Ｗ－理想在Ｆ－同态下的一些性质，得到如下主要结果：设ψ：Ｆ→Ｆ为Ｆｕｚｚｙ满同态，Ｊ为Ｆ的一个理想，Ｊ＝ψ＾－１（Ｊ）．（１）若Ｊ为Ｆ的Ｗ－理想，则Ｊ为Ｆ之间余理想，且Ｆ／θ（Ｊ）≌Ｆ／θ（Ｊ），（２）若Ｊ为Ｆ的同余理想，而Ｋｅｒψ为Ｆ的Ｗ－理想。则Ｆ／θ（Ｊ）≌Ｆ／θ（Ｊ），且Ｊ为Ｆ的ＷＳ－理想＝Ｊ为Ｆ的Ｗ－理想；（３）若Ｆ为二元Ｆｕｚｚｙ格，则Ｋｅｒψ是Ｆ的Ｗ－素理想。     

Completeness of the Metric Space Induced by Finite Measur

ＣｏｍｐｌｅｔｅｎｅｓｓｏｆｔｈｅＭｅｔｒｉｃＳｐａｃｅＩｎｄｕｃｅｄｂｙＦｉｎｉｔｅＭｅａｓｕｒＹｕＪｉａｎｌｉ；（禹建丽）ＪｉｎＪｉａｑｉ；（金家琦）ＷａｎｇＷｅｉ（（王伟）（ＬｕｏｇａｎｇＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ）（Ｋａｉｆｅ...     

两分子饱和反应系统的全局稳定性

两分子饱和反应系统的全局稳定性赵振海（大连理工大学应用数学系，１１６０２４）本文讨论了下列系统的全局稳定性：其中Ｊ＿１，Ｊ＿２，Ａ，Ｂ为非负常数，当；Ｊ＿１＞（１＋１／Ｂ）Ｊ＿２时，系统（１）有唯一正平衡点Ｒ（ｘ，ｙ），其中（１）当Ｊ＿１－３Ｊ＿２≥...     

关于余模代数的Hopf—Jacobson根的一些结果

设Ｈ是Ｈｏｐｆ代数，Ａ是右Ｈ－余模代数，若（，）满射，则Ｊ（Ａ＾ｃｏＨ）＝Ｌ＾Ｈ（Ａ）∩＾ｃｏＨ，而且，若Ｊ（Ａ）是余模理想，则Ｊ（Ａ＾ｃｏＨ）＝Ｊ＾Ｈ（Ａ）∩Ａ＾ｃｏＨ。     

分次环的分次Jacobson根

本文通过引入弱拟正则元的概念，对一般Ｍｏｎｏｉｄ分次环Ａ（未必有１）给出以内部元素刻划的分次Ｊａｃｏｂｓｏｎ根ＪＧ（Ａ）．证明当Ａ有１时，ＪＧ（Ａ）与通常定义的Ｊｇ（Ａ）相等．对ＪＧ（Ａ）性质的讨论，推广了最近的许多结果．作为应用，我们给出了Ａｒｔｉｎ分次环的全部基本结构定理．     

Polynomials with Same Degree and Congruent Julia Sets

ＬｅｔＰａｎｄＱｂｅｔｗｏｐｏｌｙｎｏｍｉａｌｓｗｉｔｈｄｅｇｒｅｅａｔｌｅａｓｔ２ａｎｄｌｅｔＪ（Ｐ）ａｎｄＪ（Ｑ）ｂｅｔｈｅＪｕｌｉａｓｅｔｓｏｆＰａｎｄＱｒｅｓｐｅｃｔｉｖｅｌｙ．ＬｅｔＥ１ｄｅｎｏｔｅｔｈｅｓｅｔｏｆａｌｃｏｎｆｏｒｍａｌｅｕ...     

The Strongly Irreducible Operators in Nest Algebras

ＴｈｅＳｔｒｏｎｇｌｙＩｒｒｅｄｕｃｉｂｌｅＯｐｅｒａｔｏｒｓｉｎＮｅｓｔＡｌｇｅｂｒａｓＪｉＹｏｕｑｉｎｇ（纪友清）ａｎｄＪｉａｎｄＣｈｕｎｌａｎ（蒋春澜）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＪｉｌｉｎＵｎｉｖｅｒｓｉｔｙ，Ｃｈａｎｇ...     

部分临界点轨道收敛于无穷大时的多项式动力系统

设Ｐ（ｚ）是ｄ（≥２）次多项式，Ｊ是Ｐ（ｚ）的Ｊｕｌｉａ集，σ：∑ｎ→∑ｎ是ｎ个符号的单边符号空间∑ｎ上的转移自映射．本文证明了当ｐ（ｚ）的某ｍ（１≤ｍ≤ｄ－１）个有穷临界点的轨道收敛于∞时，ｐ｜Ｊ拓扑半共轭于σ：∑（ｍ＋１）→∑（ｍ＋１），而当ｍ＝ｄ－１时，ｐ｜Ｊ拓扑共轭于σ：∑ｄ→∑ｄ。     

正规六边形和更广泛具有正规结构的Banach 空间

假设Ｘ是一个实Ｂａｎａｃｈ空间，Ｓ（Ｘ）是单位球面。作者引进了一个新的几何参数（Ｈ（Ｘ），讨论了Ｈ（Ｘ）和Ｎｅｕｍａｎｎ－Ｊｏｒｄａｎ常数ＣＮＪ（Ｘ）Ｒ 性质以及Ｈ（Ｘ）和其他几何常数的关系，本文主要结果是：Ｈ（Ｘ）〈２或ＣＮＪ（Ｘ）〈４／５一致正规结构。     

Faithful Inner Ideals in Jbw*-Triples

The kernel Ker(J) and the annihilator J^⊥ of a weak*-closed inner ideal J in a JBW*-triple A consist of the sets of elements a in A for which {J a J} and {J a A} are zero, respectively, and J is said to be faithful if, for every non-zero ideal I in A, I ∩ Ker (J) is non-zero. It is shown that every weak*-closed inner ideal J in A has a unique orthogonal decomposition into a faithful weak*-closed inner ideal f(J) and a weak*-closed ideal f (J)^⊥ ∩ J of A. The central structure of f ( J) is investigated and used to show that J has zero annihilator if and only if it coincides with the multiplier of f (J). The results are applied to the cases in which J is the Peirce-two or Peirce-zero space A₂(v) or A₀(v) corresponding to a tripotent v in A, and to the case in which the JBW*-triple A is a von Neumann algebra.     

The existence spectrum of Meta(K 4 (3) >K 4 (3) − e)

Let H and J1 be both t-uniform hypergraphs. Let J2 be a sub-hypergraph of J1. In this paper, the metamorphosis of a hypergraph decomposition is introduced, denoted by (H, J1 J2)-design, which is a generalization of the concept of metamorphosis of a graph decomposition. Let Meta(J1J2) denote the set of all integers v such that there exists a (Kv((3)), J1J2)-design. We completely determine the set Meta(K4((3))K4((3))-e).     

因子中原子CSL代数的Lie理想

设B是带有Cartan子代数D的因子,T(L)是B中的原子CLS代数．本文讨论了T(L)中的Lie理想的结构．证明了T(L)中的σ-弱闭子空间L是T(L)的一个Lie理想当且仅当存在T(L)的一个σ-弱闭的结合理想J和T(L)的对角部分的中心的一个子空间E使得(J)~0■L■J E,其中J~0是J中迹为0的元的全体．     

关于Jacobson根的一些研究

主要证明了:(i)假设R是右广义半正则右ACS-环,若J(R)∩I=J(I)对于R的任意右理想I都成立,则J(R)=Z(RR);(ii)如果R是右AP-内射环且R的每个奇异单右R-模是GP-内射,则对于R的任意右理想I都有J(R)∩I=J(I).     

复合矩阵与伴随矩阵的关系及应用

本文给出了复合矩阵与伴随矩阵的一个关系式及其应用,并指出文［１］中给出的关系是错误的     

Cofiniteness of Lo cal Cohomology Mo dules with Resp ect to a Pair of Ideals

Let R be a commutative Noetherian ring, I and J be two ideals of R, and M be an R-module. We study the cofiniteness and finiteness of the local cohomology module HiI,J（M） and give some conditions for the finiteness of HomR（R/I, HsI,J（M）） and Ext1R（R/I, HsI,J（M））. Also, we get some results on the attached primes of HdimMI,J （M）.     

Enumerating typical abelian prime-fold coverings of a circulant graph

Enumerating the isomorphism classes of several types of graph coverings is one of the central research topics in enumerative topological graph theory (see [R. Feng, J.H. Kwak, J. Kim, J. Lee, Isomorphism classes of concrete graph coverings, SIAM J. Discrete Math. 11 (1998) 265-272; R. Feng, J.H. Kwak, Typical circulant double coverings of a circulant graph, Discrete Math. 277 (2004) 73-85; R. Feng, J.H. Kwak, Y.S. Kwon, Enumerating typical circulant covering projections onto a circulant graph, SIAM J. Discrete Math. 19 (2005) 196-207; SIAM J. Discrete Math. 21 (2007) 548-550 (erratum); M. Hofmeister, Graph covering projections arising from finite vector spaces over finite fields, Discrete Math. 143 (1995) 87-97; M. Hofmeister, Enumeration of concrete regular covering projections, SIAM J. Discrete Math. 8 (1995) 51-61; M. Hofmeister, A note on counting connected graph covering projections, SIAM J. Discrete Math. 11 (1998) 286-292; J.H. Kwak, J. Chun, J. Lee, Enumeration of regular graph coverings having finite abelian covering transformation groups, SIAM J. Discrete Math. 11 (1998) 273-285; J.H. Kwak, J. Lee, Isomorphism classes of graph bundles, Canad. J. Math. XLII (1990) 747-761]). A covering is called abelian (or circulant, respectively) if its covering graph is a Cayley graph on an abelian (or a cyclic, respectively) group. A covering p from a Cayley graph onto another Cay (Q,Y) is called typical if the map p:A→Q on the vertex sets is a group epimorphism. Recently, the isomorphism classes of connected typical circulant r-fold coverings of a circulant graph are enumerated in [R. Feng, J.H. Kwak, Typical circulant double coverings of a circulant graph, Discrete Math. 277 (2004) 73-85] for r=2 and in [R. Feng, J.H. Kwak, Y.S. Kwon, Enumerating typical circulant covering projections onto a circulant graph, SIAM J. Discrete Math. 19 (2005) 196-207; SIAM J. Discrete Math. 21 (2007) 548-550 (erratum)] for any r. As a continuation of these works, we enumerate in this paper the isomorphism classes of typical abelian prime-fold coverings of a circulant graph.     

关于Hutton定理的一个注

本文证明了存在一个一一对应$\varphi: {\cal J}\cup{\cal J}'\longrightarrow\delta\cup\delta'$,它满足: \ \ (1) $\varphi|{\cal J}: ({\cal J},\subset)\longrightarrow(\delta,\leq)$是frame同构. \ \ (2) $\varphi|{\cal J}': ({\cal J}',\subset)\longrightarrow(\delta',\leq)$是coframe同构.     

奇异半线性发展方程的局部Cauchy问题

本文在Ｂａｎａｃｈ空间Ｅ中讨论如下问题ｄｕｄｔ＋１ｔσＡｕ＝Ｊ（ｕ），０＜ｔＴ，ｌｉｍｔ→０＋ｕ（ｔ）＝０，其中ｕ：（０，Ｔ］Ｅ，Ａ是与ｔ无关的线性算子．（－Ａ）是Ｅ上Ｃ０半群｛Ｔ（ｔ）｝ｔ０的无穷小生成元，常数σ１，Ｊ是一个非线性映射ＥＪ→Ｅ．它满足局部Ｌｉｐｓｃｈｉｔｚ条件．我们证明了当其Ｌｉｐｓｃｈｉｔｚ常数ｌ（ｒ）满足一定条件时．问题（Ｓ）有局部解，且在某函类中解唯一．设Ｊ（ｕ）＝｜ｕ｜γ－１ｕ＋ｆ（ｘ）（γ＞１），Ｅ＝Ｌｐ，ＥＪ＝Ｌｐγ时得到了与Ｗｅｉｓｌｅｒ［２］在非奇异情形类似的结果．     

Torsion de groupes munis d'une donnée radicielle

We consider groups endowed with root data associated with non-necessarily finite root systems. We generalise to these groups the twisting methods of Chevalley groups initiated by Steinberg and Ree. The resulting theorem (proved in 1988) can be applied to Kac–Moody groups: see for instance two papers published by J. Ramagge in 1995 [J. Ramagge, On certain fixed point subgroups of affine Kac–Moody groups, J. Algebra 171 (2) (1995) 473–514; J. Ramagge, A realization of certain affine Kac–Moody groups of types II and III, J. Algebra 171 (3) (1995) 713–806].