有限CN-p-群

每个子群都C-正规的有限群称为CN-群.本文首先给出二元生成的CN-p-群的完全分类.在此基础上得到CN-p-群的结构:当p为奇素数时,有限群G为CNp-群当且仅当G的每个元都平凡地作用在Φ(G)上;有限群G为CN-2-群当且仅当对任意给定的a∈G,都有对任意g∈Φ(G),g~a=g或者对任意g∈Φ(G),g~a=g~(-1).最后给出两个CN-p-群的直积是CN-p-群的判定条件.     

p6阶群的自同构群的阶

In this paper, we determine the order of automorphism group of p-groups in the third family (Φ3 ) and the fourth family (Φ4 ) in [ 1 ], whose order is p^6 ( p ≥ 3). Here p denotes an odd prime.     

4p阶群及2p2阶群的自同构群

给出了4p阶群和2p^2阶群的自同构群的结构,这里P是奇素数。     

某些以p群为自同构群的p^6阶群

该文给出了三个以p群为自同构群的p6阶群,并得到了它们的自同构群的阶.在这里p表示奇素数.     

换位子群为p阶群的有限p-群的自同构群

设G是换位子群为p阶群的有限p-群,确定了AutG的结构,证明了(i)AutG/AutGG≌Zp-1,其中AutGG={α∈AutG|α平凡地作用在G上}.(ii)AutGG/Op(AutG)≌iGL(ni,p)×jSp(2mj,p),其中Op(AutG)是AutG的最大正规p-子群,ni和mj由G惟一确定.     

拟极小外p-自同构不动点子群为p阶的p-群

阶为某素数p的方幂的自同构如果不是内自同构,则称其为外p-自同构.如果φ是群G的外p-自同构且o(φ)=p,其中φ是φ在Out(G)=Aut(G)/Inn(G)中的自然同态像,则称φ为群G的拟极小外p-自同构.设φ是有限p-群G的任意拟极小外p-自同构,给出了|C_G(φ)|≤p时G的结构.     

具有4pq阶自同构群的有限群

本文讨论了自同构群阶为4pq(p,q为不同奇素数)的有限群,得出了它们的构造.     

有限ATI-群的类保持Coleman自同构

设G是一个有限群,对G的任意阿贝尔子群A及任意g∈G,若A∩A~g=1或A,则称G为一个ATI-群.本文证明了,对任意p∈τ(G),如果ATI-群G的一个p-方幂阶类保持自同构在G的任意Sylow子群上的限制等于G的某个内自同构的限制,则它必定是一个内自同构.作为该结果的一个直接推论,我们也证明了有限ATI-群G有正规化性质.     

|A(G)|=26p2(p为奇素数)的有限Abel群G

本文根据有限Abel群G的自同构群A(G)的阶研究了群G的构造.利用有限交换群的一些性质,经过详细的理论推导,获得了|A(G)|=26p2(p为奇素数)的有限Abel群G的全部类型.     

关于自同构群方程|Aut(G)|=P2Q2

本文给出满足｜Aut(G)｜=p2q2的有限群G的完全分类,p和q是不同的素数.     

Error-Controlled Model Order Reduction of Second Order Systems with Adaptive Choice of Shifts and Order

This contribution summarizes a novel approach to error-controlled model order reduction of second order systems, i. e. a new way to find a reduced order model of specified approximation quality. To this end, starting from a particular state space realization of the model, one performs multiple reduction steps and increments the reduced model until (computationally affordable) rigorous global error bounds fall below the prescribed limit. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)     

模糊全序及偏序结构

以Fodor等人对模糊偏好构模的公理化方法的一个特例为基础,给出了模糊全序以及偏序结构的定义,并详细讨论了两个结构的性质。     

On the Restricted Order of Asymptotic Bases of Order Two

The restricted order of an asymptotic basis A is the least integer h, if it exists, such that every sufficiently large integer is the sum of h or fewer distinct elements of A. We show that any asymptotic basis of order 2 has a restricted order at most equal to 4. We also provide an example of an additive basis of order 2 whose restricted order is 4.To Jean-Louis Nicolas2000 Mathematics Subject Classification: Primary—11B13     

Order of Operations

<正>In mathematics,A numerical expression like 4+3×5 or 2²+6÷2 is a combination of numbers and operations.The order of operations tells you which operation to perform first so that everyone gets the same final answer.What you will learn?Evaluate expressions using the order of operations.Today we will talk about"Order of Operations".     

The Order on the Rationals has an Orthogonal Order with the Same Order Type

Two orders on the same set are orthogonal if the constant maps and the identity map are the only maps preserving both orders. We construct linear orders orthogonal to the order on the rationals.     

First Order LSFEM for Second Order Hyperbolic Problems

In the last years the interest in least squares finite element methods has grown due to some interesting properties of these methods (cf. the monographs [1], [2]). While for many elliptic problems the theoretical background has been established, only a few articles analyse least squares methods for transient problems. In this article some new stability estimates for the least squares method for the wave equation in 1 and 2 dimensions are derived. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)     

On the Order of Strongly Starlikeness of Convex Functions of Order Alpha

In this work the order of strongly starlikeness of convex functions of order alpha is discussed.     

实值随机变量的随机序与对偶随机序

本文讨论随机变量的高阶序问题，1简要地叙述了随机变量排序的经济学含义，主要是期望效用理论与其对偶理论，2讨论了实值随机变量基于分布函数的高阶序问题，给出了其基于期望效用理论的刻画。3讨论的是实值随机变量的基于对偶理论（对偶矩)的高阶序问题，并给出了其基于随机变量的Yarri等价性度量的刻画。     

On Projective Planes of Order 15 Admitting a Collineation of Order 7

In this article we prove that there is no projective plane of order 15 admitting a collineation group of order 21. C. Y. Ho proved that there is no projective plane of order 15 admitting a collineation group of order 49. But his proof is incorrect. We also correct his error. The conclusion remains the same. We used a computer for our research.     

序同态的NC－连续性

本文在ＬＦ拓扑空间上利用良紧性作为背景引进了序同态的ＮＣ－连续性、分子网和理想的ＮＣ－收敛性及ＮＣ－闭包算子等概念，系统地讨论了这些概念之间的关系以及ＮＣ－连续序同态的特性，得到了若干重要的结果。