S紧locale与S紧空间

本文给出Ｓ紧ｌｏｃａｌｅ的内在刻画,作为推论,得到了一般Ｓ紧空间的内在刻画     

Free involutions on S 2 × S 3

In this paper, we classify smooth 5-manifolds with fundamental group isomorphic to ${\mathbb{Z}/2}$ and universal cover diffeomorphic to S ² × S ³. This gives a classification of smooth free involutions on S ² × S ³ up to conjugation.     

关于S—集与S—闭包

一 导言 本文利用S-集与S-闭包的概念,来讨论S-闭空间及有关空间或映射,给出了这些空间与映射的一些性质。我们的一些结果改进或推广了[1]、[2]、[3]、[7]中的相应定理。 本文未加定义而直接使用的术语与符号的意义,请参考文[1]、[2],与[1]不同的只是本文除另有说明外,一般不要求拓扑空间满足任何分离性公理。 下面这条引理,文中使用较多,证明较易,故略去。     

关于Clifford半群S和Brandt半群S的S↑^的构造

设Ｓ是半群,Ｓ↑＾是Ｓ↑＾上所有一一偏的右平移构成的逆半群。在本文中证明了,对Ｃｌｉｆｆｏｒｄ半群Ｓ＝［Ｙ;Ｇα,φα,β］,Ｓ↑＾≌ｌｉｍ｛Ｇα｝α∈Ｙ,而对Ｂｒａｎｄｔ半群Ｓ＝Ｂ（Ｇ,Ｉ）,Ｓ↑＾≌ＧｗｒＪ（Ｉ）。     

基于S1S2IR双S模型在微信谣言传播中的研究

随着网络化社交工具的日益普及与应用,研究社交网络中的舆情传播行为与机制具有重要的理论和实际应用意义.通过对微信用户(含公众号)网络行为的分析,重点研究网络中谣言的传播行为,并提出了一种在SIR模型基础之上的改进模型-S1S2IR双S谣言传播模型.其核心改进思路是将"普通用户(S)"细分成受微信公众号影响的用户子集和受微信好友影响的用户子集,该划分从数学建模的角度来讲是切实可行的,并得出平均场方程且对其稳定性进行分析和验证.利用MATLAB进行模拟仿真,对传播过程进行数值模拟,分析在谣言传播过程中,不同参数的变化,对谣言传播过程的影响.最后得出政府部门不仅要对微信用户之间的交流接触进行管理,同时对于微信公众账号也要进行严格的审核和管控,减少谣言在微信中的传播,维持社会的稳定.     

关于Clifford半群S和Brandt半群S的S的构造(英文)

设Ｓ是半群,Ｓ是Ｓ上所有一一偏的右平移构成的逆半群．在本文中证明了,对Ｃｌｉｆｏｒｄ半群Ｓ＝［Ｙ;Ｇα,φα,β］,Ｓｉｍｌｉｍ｛Ｇα｝α∈Ｙ,而对Ｂｒａｎｄｔ半群Ｓ＝Ｂ（Ｇ,Ｉ）,ＳＧｗｒＪ（Ｉ）．     

有向S—回路和有向S—迹

本文给出了有向生成回路和有向生成迹的几个充分条件。 设G为强连通1—图,无环,n阶。对于G的任两不相邻顶点x,y。①如果 d(x)+d(y)≥2n+1。那么对于G的任两顶点u和v,或有u-v有向S-迹,或有v-u有向S-迹。②如果 d(x)+d(y)≥2n-3。那么G含有向S-回路。     

性质S的注记

本文刻划了性质S的几个等价条件。在一定条件下,证明了性质S可以遗传到子C~*-代数上去,从而部分地肯定回答了Lance,E.C.的一个问题。另外,还讨论了群在具有性质S的C~*-代数上的作用。     

(S − 1,S) Perishable systems with stochastic leadtimes

This article discusses a one-to-one ordering perishable system, in which reorders are processed in the order of their arrival and the processing times are arbitrarily distributed, and as such, the leadtimes are not independent. The Markov renewal techniques are employed to obtain the various operating characteristics for the case of Poisson demand and exponential lifetimes. The problem of minimizing the steady state expected cost rate is also discussed, and in the special case of exponential processing times, the optimal stock level is derived explicitly.     

Invariant Sp(1)-instantons on S 2 × S 2

In this paper all (anti)self-dual invariant connections on homogeneous quaternionic line bundles over S ² × S ² are calculated and described in terms of the isotropy homomorphism of the bundle using Wang's theorem. These are the canonical connections on bundles with an (anti)symmetric twist and an S ¹-parametrized family of flat structures on bundles with a simple twist.     

拓扑分子格的S紧性和S次紧性

利用半开元等半拓扑概念在拓扑分子格中引入S紧性与S次紧性，给出了它们的刻画，推广了文[1]中的紧性与次紧性，证明了拓扑分子格的S紧性，S次紧性，STi分离性(i=-1，0，1，2)与STi^*分离性(i=0，1，2)为半拓扑性质。     

On the Matrix Equation X = Q − S∗X†S

The positive semidefinite solutions of the nonlinear matrix equation X + S? X?S = Q are investigated. We consider an iterative method converges to a positive semidefinite solution of this equation under the condition Ker X ? Ker S?. The new results are illustrated by numerical examples.     

Presentations for S and S/ρ from a Given Presentation for ρ

We consider a congruence on a semigroup S as a subsemigroup of the direct product S × S. Then we prove that if is finitely presented then both S and S/ are finitely presented.     

ON KORN‘S INEQUALITY

This paper is devoted to give a new proof of Korn's inequality in LT - norm (1 < γ < ∞).     

ON ABEL-GONTSCHAROFF-GOULD＇S POLYNOMIALS

In this paper a connective study of Gould‘s annihilation coefficients and Abel-Gontscharoff polynomials is presented. It is shown that Gould‘s annihilation coefficients and Abel-Gontscharoff polynomials are actually equivalent to each other under certain linear substitutions for the variables. Moreover, a pair of related expansion formulas involving Gontscharoff‘s remainder and a new form of it are demonstrated, and also illustrated with several examples.     

强S—Lindelof空间

利用强半开集定义了强S-Lindelof可数性的概念,讨论了其基本性质．证明了强S-Lindelof性对强半闭子集是遗传的,具有强半同胚不变性等,并给出了强S-Lindelof空间的一些应用．     

ON OPPENHEIM＇S INEQUALITY

We prove several inequalies for symmetric postive semidefinite, general M-matrices and inverse Mmatrices which are generalization of the classical Oppenheim‘s Inequality for symmetric positive semidefinite matrices.     

Fourier Transforms of Bounded Bilinear Forms on C＊（S1）×C＊（S2） of Foundation ＊-semigroups S1 and S2

The author gives a characterization of the Fourier transforms of bounded bilinear forms on C＊（S1）×C＊（S2） of two foundation semigroups S1 and S2 in terms of Jordan ＊-representations, hemimogeneous random fields, and as well as weakly harmonizable random fields of S1 and S2 into Hilbert spaces.