侧完备Riesz空间中理想的直和及其表示定理

设{Ei：i∈I)是侧完备Riesz空间E中的一族理想，且Ei∩Ej=θ(i，j∈I，i≠j)．文章引入理想族{Ei：i∈I)直和的概念，并给出一个表示定理．文章证明了：存在一个完备的正则Hausdorff空间X使得理想族的直和Riesz同构于C(X)其充要条件是对每个i∈I存在一个紧Hausdorff空间Xi使得Ei Riesz同构于C(X)．     

Riesz乘积空间和表示理论

设｛Ｅｉ：ｉ∈Ｉ｝是一族ＡｒｃｈｍｉｄｅａｎＲｉｅｓｚ空间．记Πｉ∈ＩＥｉ为Ｒｉｅｓｚ乘积空间．此文的主要结论是：存在一个完全正则Ｈｏｕｓｄｏｒｆ空间Ｘ使得Πｉ∈ＩＥｉＲｉｅｓｚ同构于Ｃ（Ｘ）的充分必要条件是对每一个ｉ∈Ｉ存在一个完全正则Ｈｏｕｓｄｏｒｆ空间Ｘｉ使得ＥｉＲｉｅｓｚ同构于Ｃ（Ｘｉ）．     

Riesz空间中的极大不相交系和表示理论

设Ｅ是阿基米德Ｒｉｅｓｚ空间，有弱单位元ｅ和极大不相交系｛ｅｉ：ｉ∈Ｉ｝，其中每一个ｅｉ都是投影元素．由ｅｉ生成的主带记为Ｂ（ｅｉ）．本文考虑如下论述：（ａ）存在完全正则Ｈａｕｓｄｏｒｆ空间Ｘ，使Ｅ是Ｒｉｅｓｚ同构于Ｃ（Ｘ）；（ｂ）对每一个ｉ∈Ｉ，存在一个完全正则Ｈａｕｓｄｏｒｆ空间Ｘｉ使Ｂ（ｅｉ）是Ｒｉｅｓｚ同构于Ｃ（Ｘｉ）．我们证明（ａ）可推出（ｂ）．但其逆在一般情况下不成立．当（ｂ）成立时，我们得到一些与（ａ）等价的论述．     

渐近非扩张型的自映象族的不动点与几乎轨道的渐近行为

设Ｃ是一致凸Ｂａｎａｃｈ空间Ｅ的非空闭凸子集,Г＝｛Ｔｔ：ｔ ∈ Ｓ｝是Ｃ上渐进非扩张型的自映象族,使得对每个ｔ∈Ｓ,Ｔｔ：Ｃ→Ｃ连续,其中,Ｓ是有单位元的交换的拓扑半群．又设｛ｕ（ｔ）：ｔ∈Ｓ｝是Г的几乎轨道．本文证明了,若Г在｛ｕ（ｔ）：ｔ∈ Ｓ｝关于Ｃ的渐近中心ｃ∈Ｃ处渐近正则,则下列叙述等价：（ｉ）Ｔｔ,ｔ∈Ｓ的所有公共不动点之集Ｆ（Г）非空;（ｉｉ）｛ｕ（ｔ）：ｔ∈Ｓ｝局部有界;（ｉｉｉ）ｌｉｍｔ｜｜Ｔｔｃ－ｃ｜｜＝０;（ｉｖ） ｃ∈ Ｆ（Г）．进一步,运用该结果,本文建立了渐近非扩张族的几乎轨道的渐近行为方面的结果．     

THE DECOMPOSITION THEOREM OF A PROBABILITY-FLOW

suppose that p is a Markov transition matrix on the sapce E,and {ui}(\[i \in E\])is an initial distribution.The Matrix (ui,pij)is called a probility-flow.we obtain the following theorem:For any initial distribution {ui}(ui>0)which need not be stationary,we have \[{u_i}{p_{ij}} = {u_i}{p_{ij}}^d + \sum\limits_{k \in K} {{r_{ij}}^{(k)}} + \sum\limits_{i \in L} {{g_{ij}}^{(l)}} \] where, 1) \[{u_i}{p_{ij}}^d = {u_i}{p_{ij}}^d(i,j \in E)\] \[{p_{ij}}^d\]is called the detailed balabce part of p; 2)For each \[k \in K\](at most denumerable),there is a circular road \[{a^{(k)}} = (i_1^{(k)},i_2^{(k)},...,i_n^{(k)},i_1^{(k)})\](\[n \geqslant 3,{i_s} \ne {i_t}(S \ne t,1 \leqslant S,t \leqslant n\]),and there is a constant \[{c_k} > 0\],such that \[{r_{ij}}^{(k)} = \left\{ {\begin{array}{*{20}{c}} {{c_k},(i,j) \in {a^{(k)}}} \\ {0,(else)} \end{array}} \right.\] and \[\sum\limits_{k \in K} {{r_{ij}}^{(k)}} \] is called the circulation part of p; 3)For any \[l \in L\](at most denumerable),there is a read in E; \[{r^{(l)}} = (j_1^{(1)},...,j_n^{(l)})\] \[n \geqslant 2,{j_s}^{(l)} \ne {j_t}^{(l)}(s \ne t,l \leqslant s,t \leqslant n)\],and there is a constant \[{d_l} > 0\],such that \[{g_{ij}}^{(l)} = \left\{ {\begin{array}{*{20}{c}} {{d_l},(i,j) \in {r^l}} \\ {0,(else)} \end{array}} \right.\] and \[\sum\limits_{i \in L} {{g_{ij}}^{(l)}} \]is called the divergent part of p. This theorem is extetion of the theorem of circulation decomposition given by Qian Minping.     

有限个严格压缩映像隐迭代格式的逼近

假设E为一致凸的Banach空间,对偶空间E*有Kadec-Klee性质,K为E的非空闭凸子集{Ti:i=1,2,…,N}:K→K为Browder-Petryshyn意义下的严格伪压缩映像且F=∩Ni=1F(Ti)≠0.{αn}n∞=1满足0相似文献   

Cauchy problem in nonlocal statement for a system of fractional partial differential equations

We study the system $D_{0y}^\alpha u_i + ( - 1)^{i - 1} \lambda \frac{\partial } {{\partial x}}u_i = a_{i1} u_1 + a_{i2} u_2 + f_i $D_{0y}^\alpha u_i + ( - 1)^{i - 1} \lambda \frac{\partial } {{\partial x}}u_i = a_{i1} u_1 + a_{i2} u_2 + f_i , i = 1, 2, of Riemann-Liouville fractional partial differential equations with constant coefficients and prove theorems on the existence and uniqueness of a solution of a Cauchy problem in nonlocal statement.     

与线性变换的完全环同构的环理论(Ⅲ)

<正> 本文继上文[1,2]的理论,对线性变换完全环的结构作进一步研究.在§1中我们讨论一般无限矩阵的几何意义.在§2中我们用有限维向量空间的线性变换完全环来构作无限维向量空间的线性变换完全环.我们的思想方法是:设是向量空间,     

有限个非扩张非自映像隐迭代格式的逼近

假设E为一致凸Banach空间,K为E的非空闭凸子集且为E的非扩张收缩,P为非扩张收缩映像.{Ti:i=1,2,…,N}:K→E为非扩张映像且F(T)=∩ from i=1 to N F(Ti)≠■.定义{xn}如下:x0∈K,xn=P(αnxn-1+(1-αn)TnP[βnxn-1+(1-βn)Tnxn]),n≥1,这里{αn},{βn}为[δ,1-δ]中的实序列,其中δ∈(0,1).若{Ti:i=1,2,…,N}满足条件(B),则{xn}强收敛于x*∈F(T).     

一类Clifford半群的刻画

G是一个群,I是一个指标集.令CG=G×I={(g,i):g∈G,i∈I};(a,i)(b,j)=(ab,k)with k=min{i,j}则CG是一个半群.事实上,CG是Clifford半群,并且CG代表了一类特殊的Clifford半群.     

具误差隐格式迭代逼近严格伪压缩映像族公共不动点

设K是实Banach空间E中非空闭凸集, {Ti}i=1N是N个具公共不动点集F的严格伪压缩映像, {an}(?)[0,1]是实数列, {un}(?)K是序列,且满足下面条件设X0∈K,{xn}由下式定义xn=αnxn-1 (1-αn)Tnxn-un-1,n≥1其中Tn=TnmodN,则有下面结论(i)limn→∞‖xn-p‖存在,对所有P∈F; (ii)limn→∞d(xn,F)存在,当d(xn,F)=infp∈F‖xn-p‖; (iii)liminfn→∞‖xn-Tnxn‖=0．文中另一个结果是,如果{xn}(?){1-2-n,1},则{xn}收敛．文中结果改进与扩展了Osilike(2004)最近的结果,证明方法也不同．     

An algebraic invariant for Jordan automorphisms on B(H): The set of idempotents

Let H be an infinite dimensional complex Hilbert space. Denote by B(H)the algebra of all bounded linear operators on H, and by I(H) the set of all idempotents in B(H). Suppose that φ is a surjective map from B(H) onto itself. If for everyλ∈ {-1, 1, 2, 3, 1/2, 1/3} and A, B ∈ B(H), A - λB ∈ I(H) (→)φ(A) - λφ(B) ∈ I(H), then φis a Jordan ring automorphism, i.e. there exists a continuous invertible linear or conjugate linear operator T on H such that φ(A) = TAT-1 for all A ∈ B(H), or φ(A) = TA*T-1 for all A ∈ B(H); if, in addition, A - iB ∈ I(H) (→)φ(A) - iφ(B) ∈ I(H), here i is the imaginary unit, then φ is either an automorphism or an anti-automorphism.     

Banach空间中的平均非扩张映象:不动点的存在定理

<正> 设X是Banach空间,E是X中的集合,T是映集合E到自身的映象.若T满足条件(称为平均非扩张条件)其中x,y∈E,a,b,c≥0且a+2b+2c≤1,则称T是平均非扩张映象. 文[1]概括了近年来研究关于平均非扩张映象不动点的一些主要结果.本文进     

Banach空间非扩张映像不动点强收敛定理

设E是具弱序列连续对偶映像自反Banach空间, C是E中闭凸集, T:C→ C是具非空不动点集F(T)的非扩张映像.给定u∈ C,对任意初值x0∈ C,实数列{αn}n∞=0,{βn}∞n=0∈ (0,1),满足如下条件:(i)sum from n=α to ∞α_n=∞, α_n→0;(ii)β_n∈[0,α) for some α∈(0,1);(iii)sun for n=α to ∞|α_(n-1) α_n|<∞,sum from n=α|β_(n-1)-β_n|<∞设{x_n}_(n_1)~∞是由下式定义的迭代序列:{y_n=β_nx_n (1-β_n)Tx_n x_(n 1)=α_nu (1-α_n)y_n Then {x_n}_(n=1)~∞则{x_n}_(n=1)~∞强收敛于T的某不动点.     

Boundary distortion and variation of the module under an extension of a doubly connected domain

Theorem 2

Let f(z) ∈ $\mathcal{F}(\rho ,r)$ , f(z) ≠ e^iα f(z;pr), α ∈ ?, and let ?(t) be a strictly convex monotone function of t>0. Then $$\int\limits_0^{2\pi } {\Phi (|f'(e^{i\theta } )|)d\theta< } \int\limits_0^{2\pi } {\Phi (|f'(e^{i\theta } ;\rho ,r)|)d\theta } $$ . The proof of this theorem is based on the Golusin-Komatu equation. If E is a continuum in the disk U_R={z:|z|<R}, then M (R, E) denotes the conformal module of the doubly connected component of U_R/E; let $\varepsilon (m) = \{ E:\overline U _r \subset E \subset U_1 , M(1,E) = M^{ - 1} \} $ .

Problem 3

Find the maximum of M(R, E), R>1, and the minimum of cap E over all E in ε(m). This problem was posed by V. V. Kozevnikov in a lecture to the Seminar on Geometric Function Theory at the Kuban University in 1980, and by D. Gaier (see [2]). The solution of this problem is given by the following theorem.

Theorem 3

Let $E^* = \underline U _m \cup [m,s]$ . If R>1; E, E^* ∈ ε(m) and E ≠ e^iα E*, α ∈ ?, then M(R, E)<M(R, E^*), capE^*<capE. A similar statement is also proved for continua lying in the half-plane. Bibliography: 7 titles.     

与线性变换的完全环同构的环理论(Ⅳ)

<正> 基座概念对本原环的结构研究起着十分重要作用.为了对本原环的结构作进一步研究,我们引进俨基座概念.通常基座概念就是我们特殊情形的o-基座概念.利用ν-基座概念,我们建立了ν-结构定理。通常本原环结构定理(见[2]p.75)是ν-结构定理的一种特殊情况. 为了引进ν-基座,我们改变一下本原环的基座定义,使它具有能表达ν-基座的一般形式的特点且能建立所要求的ν-结构定理.为此我们来提一下§2中所获得的结果:     

逼近非扩张非自映像不动点（英文）

设E是一致凸Banach空间,K是E中非空闭凸集且是一个非扩张收缩核,T：K→E是具非空不动点集F（T）：={x∈K：Tx=x}的非扩张映像.设{α_n},{β_n},{γ_n},{α′_n},{β′_n},{γ′_n}是[0,1]中实数列满足α_n＋β_n＋γ_n=α′_n＋γ′_n＋γ′_n=1,对任意初值x_1∈K,定义{x_n}如下（ⅰ）如果对偶空间E＊具有Kadec-Klee性质,那么{x_n}弱收敛于T的某不动点x＊∈F（T）;（ⅱ）若T满足（A）条件,那么{x_n}强收敛于T的某不动点x＊∈F（T）.     

Existence and Stability of Solitary Waves of an M-Coupled Nonlinear Schrödinger System

In this paper, the existence and stability results for ground state solutions of an m-coupled nonlinear Schrödinger system $$i\frac{∂}{∂ t}u_j+\frac{∂²}{∂x²}u_j+\sum\limits^m_{i=1}b_{ij}|u_i|^p|u_j|^{p-2}u_j=0,$$ are established, where $2 ≤ m, 2≤p<3$ and $u_j$ are complex-valued functions of $(x,t) ∈ \mathbb{R}^2, j=1,...,m$ and $b_{ij}$ are positive constants satisfying $b_{ij}=b_{ji}$. In contrast with other methods used before to establish existence and stability of solitary wave solutions where the constraints of the variational minimization problem are related to one another, our approach here characterizes ground state solutions as minimizers of an energy functional subject to independent constraints. The set of minimizers is shown to be orbitally stable and further information about the structure of the set is given in certain cases.     

Quantitative properties of ground-states to an <Emphasis Type="Italic">M</Emphasis>-coupled system with critical exponent in ℝ<Superscript><Emphasis Type="Italic">N</Emphasis></Superscript>

In this paper, we consider the ground-states of the following M-coupled system:

$$\left\{ {\begin{array}{*{20}{c}}{ - \Delta {u_i} = \sum\limits_{j = 1}^M {{k_{ij}}\frac{{2{q_{ij}}}}{{2*}}{{\left| {{u_j}} \right|}^{{p_{ij}}}}{{\left| {{u_i}} \right|}^{{q_{ij}} - {2_{{u_i}}}}},x \in {\mathbb{R}^N},} } \\{{u_i} \in {D^{1,2}}\left( {{\mathbb{R}^N}} \right),i = 1,2, \ldots ,M,}\end{array}} \right.$$

where \(p_{ij} + q_{ij} = 2*: = \frac{{2N}}{{N - 2}}(N \geqslant 3)\). We prove the existence of ground-states to the M-coupled system. At the same time, we not only give out the characterization of the ground-states, but also study the number of the ground-states, containing the positive ground-states and the semi-trivial ground-states, which may be the first result studying the number of not only positive ground-states but also semi-trivial ground-states.

     

Pm×Kn的邻点可区别全色数

设G是简单图．设f是一个从V(G)∪E(G)到{1,2,…,k}的映射．对每个v∈V(G),令C_f(v)={f(v)}∪{f(vw)|w∈V(G),vw∈E(G)}．如果f是k-正常全染色,且对任意u,v∈V(G),uv∈E(G),有C_f(u)≠C_f(v),那么称f为图G的邻点可区别全染色(简称为k-AVDTC)．数x_(at)(G)=min{k|G有k-AVDTC}称为图G的邻点可区别全色数．本文给出路P_m和完全图K_n的Cartesion积的邻点可区别全色数．