Homomorphisms Between Multiplicative Semigroups of Matrices Over Fields

Suppose F is a field, and n, p are integers with 1 ≤ p 〈 n. Let Mn（F） be the multiplicative semigroup of all n × n matrices over F, and let M^Pn（F） be its subsemigroup consisting of all matrices with rank p at most. Assume that F and R are subsemigroups of Mn（F） such that F M^Pn（F）. A map f ： F→R is called a homomorphism if f（AB） = f（A）f（B） for any A, B ∈F. In particular, f is called an endomorphism if F = R. The structure of all homomorphisms from F to R （respectively, all endomorphisms of Mn（F）） is described.     

关于Hausdorff测度的一个不等式

设F是R2中的子集,则下列不等式成立Hs(F)Bs(F)(2 33)sHs(F)其中s=d imH(F),Bs(F)如(6)式中所定义.     

LF内部空间的仿紧性

在LF内部空间中,引入了Q-内部域、α-Q-内部族等概念,并以此定义了F紧集和F仿紧集,给出了它们的特征刻画。证明了F紧集是F仿紧集,F仿紧性是F可乘性。     

SOME RESULTS ON PRODUCT COMPLEX FINSLER MANIFOLDS

Let (M, F ) be the product complex Finsler manifold of two strongly pseudoconvex complex Finsler manifolds (M 1 , F 1 ) and (M 2 , F 2 ). In this paper, we obtain the relationship between the Chern Finsler connection coefficients Γ i ; k associated to F and the Chern Finsler connection coefficients Γ a ; c , Γα ; γ associated to F 1 , F 2 , respectively. As applications we prove that, if both (M 1 , F 1 ) and (M 2 , F 2 ) are strongly Ka¨hler Finsler (complex Berwald, or locally complex Minkowski, respectively) manifolds, so does (M, F ). Furthermore, we prove that the holomorphic curvature K F = 0 if and only if K F1 = 0 and K F2 = 0.     

Chevalley群的一类子群的研究

设G＝L（F）是特征不为2的域F上Chevalley群,型为B1（l≥4）,Cl（l≥3）,Dl（l≥5）,E6,E7,E8或F4之一．当L（F）型为B4或F4时还假设F=F2设Lα1是L（F）的一类Levy子群．本文决定Lα1的正规化子在L（F）中的极大性．     

不同浓度罗哌卡因联合芬太尼行硬膜外分娩镇痛的量效观察

目的探讨罗哌卡因联合芬太尼行硬膜外分娩镇痛的最佳有效浓度。方法选择120例初产妇接受L2-3硬膜外穿刺置管拟行分娩镇痛．按随机数字表法分为0．15％罗哌卡因联合1ug／ml芬太尼（F1组）、0．12％罗哌卡因联合1ug／ml芬太尼（F2组）、0．10％罗哌卡因联合1ug／ml芬太尼（F3组）及0．08％罗哌卡因联合1ug／ml芬太尼（F4组）。监测镇痛过程中阻滞平面和运动阻滞发生情况、VAS、缩富素使用增加例数等。结果F1、F2组运动神经阻滞发生的例数多于F3、F4组（P〈0．05）。F1组缩宫素使用增加例数多于其它3组（P〈0．05）。不同罗哌卡因浓度比较,F4组起效时间最长,明显长于F1、F2、F3组（P〈0．05）。F4组给药后30、60、90min时的VAS明显高于F1、F2、F3组,停药时的VAS明显高于F1组（P〈0．05）。F4组镇痛后30min内第3次宫缩开始每次宫缩对应的VAS明显高于F1、F2、F3组（P〈0．05）。结论罗哌卡因联合1ug／ml芬太尼用于分娩镇痛时,010％是最佳有效浓度,镇痛效果好,运动阻滞轻,安全性高。     

从特殊线性群到一般射影线性群的同态的一个性质

设F,K为域,GLn（F）,SLn（F）分别表示F上的n级一般线生群和n级特殊线性群．PGLn（F）,PSLn（F）分别表示F上的n级射影一般线性群和n级射影特殊线性群．φ：SLn（F）→PGLn（K）,n≥3为非平凡同态．本文确定了当K的持征为2时η的—个性质．     

The Order Properties of r-compact Operators on Banach Lattices

We present here that F（E,F）, the space of all r-compact operators from E into F, is a generalised sublattice of L^r（E, F） for arbitary Banach lattices E and F, and that the characterization of the regular norm on F（E, F） is order continuous. Some conditions for F（E, F） to be a KB-space or a band in .L（E, F） are also provided.     

环F_3+vF_3上的循环码与常循环码（英文）

本文研究了环F3+v F3上的循环码与常循环码.通过环F3+v F3与域F3上的循环码之间关系,证明了环F3+v F3上循环码是由一个多项式生成的.最后,用类似的方法,得到了环F3+v F3上v-常循环码也是由一个多项式生成的.     

用投影寻踪自助法进行多元分布函数的拟合优度检验

文中记 F 为 q 维分布函数,P 是概率测度,P_F 是由分布函数 F 所规定的概率测度.在进行统计推断时,常常需要知道统计量 R(X_1,…,X_n;F)的分布 J_n(x,F)=P_F(R(X_1,(?),X_n;F)≤x),其中 X_1,…,X_n i i d～F,i i d 表独立同分布,或者用 R(X_1,…,X_n;F)的极限分布 J(x,F).但是 J_n(x,F)和 J(x,F)经常与 F 有关,即使 F 知道,J_n(x,F)和 J(x,F)的确切表达式大多是不知道的.倘若 F 未知,就更难知道 J_n(x,F)     

两个半光滑函数之和的非光滑方程组解法

对两个半光滑函数之和F（x）=F1（x）＋F2（x），其中F1，F2均为半光滑函数，给出了求解F（x）=0的一种广义牛顿法．算法在每一迭代点处分别计算中一个元素，而不需计算中元素．     

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.     

一类Sierpinski垫片的Hausdorff测度的估计(英文)

Suppose F0 is an arbitrary triangle and F is a kind of Sierpinski carpet generated by F0.We construct a projection mapping to obtain the lower bound of the Hausdorff measure of F ;meanwhile the upper bound of the Hausdorff measure of F is calculated by the general covering.     

保特征2域上上三角矩阵群逆的线性映射

设F是一个特征2且至少含有5个元素的域,n≥2是一个正整数．令Mn（F）和Tn（F）分别F上的全矩阵空间和上三角矩阵空间．我们首先刻划从Tn（F）到Mn（F）的保矩阵群逆的所有线性单射，由此从Tn（F）到自身的所有保矩阵群逆的线性双射被刻划．     

Objective triangle functors

An additive functor F:A→B between additive categories is said to be objective,provided any morphism f in A with F(f)=0 factors through an object K with F(K)=0.We concentrate on triangle functors between triangulated categories.The first aim of this paper is to characterize objective triangle functors F in several ways.Second,we are interested in the corresponding Verdier quotient functors VF:A→A/Ker F,in particular we want to know under what conditions VF is full.The third question to be considered concerns the possibility to factorize a given triangle functor F=F2F1with F1a full and dense triangle functor and F2a faithful triangle functor.It turns out that the behavior of splitting monomorphisms and splitting epimorphisms plays a decisive role.     

L-拓扑空间的单点超F紧化

给出L-拓扑空间的单点超F紧化的一种具体作法,以及局部超F紧性的定义,并证明了:(1)局部超F紧性是L-好推广;(2)一个L-拓扑空间是局部超F紧T2空间当且仅当其单点超F紧化空间是超F紧T2空间;(3)单点超F紧化在同胚意义下是唯一的。     

Local automorphisms of semisimple algebras and group algebras

Let F be a field of characteristic not 2, and let A be a finite-dimensional semisimple F -algebra. All local automorphisms of A are characterized when all the degrees of A are larger than 1. If F is further assumed to be an algebraically closed field of characteristic zero, K a finite group, F K the group algebra of K over F , then all local automorphisms of F K are also characterized.     

点态化Fuzzy幂群的转移定理

从F uz zy点的角度来研究F uz zy幂群,建立F uz zy幂群的转移定理,然后通过转移定理将分明幂群的许多概念和结论直接转到F uz zy幂群,揭示了F uz zy幂群与分明幂群的关系。     

A Note on Heegaard Genus of Self-amalgamated 3-Manifold

Let M be a connected orientable compact irreducible 3-manifold. Suppose that αM consists of two homeomorphic surfaces F1 and F2, and both F1 and F2 are compressible in M. Suppose furthermore that g(M, F1) = g(M) + g(F1), where g(M, F1)is the Heegaard genus of M relative to F1. Let Mfbe the closed orientable 3-manifold obtained by identifying F1 and F2 using a homeomorphism f : F1 → F2. The authors show that if f is sufficiently complicated, then g(Mf) = g(M, αM) + 1.     

矩阵多项式空间的进一步研究

设A为数域F上的n级矩阵,记F[A]={f(A)|f(x)∈F[x]},它显然是F~(n×n)的子空间.讨论了F[A]的基和维数,引入了f(A)的坐标和F[A]的因式子空间的概念,给出了用因式子空间表示F[A]的几个定理,刻画了F[A]的结构.