数学学报杂志 北大期刊 CSCD期刊 统计源期刊

Perturbations of Frames

作者：Dong; Yang; CHEN; Lei; LI; Ben; Tuo; ZHENG 刊期：2014年第07期

In this paper,we give some sufficient conditions under which perturbations preserve Hilbert frames and near-Riesz bases.Similar results are also extended to frame sequences,Riesz sequences and Schauder frames.It is worth mentioning that some of our perturbation conditions are quite different from those used in the pr...

Perturbations of Moore-Penrose Metric Generalized Inverses of Linear Operators in Banach Spaces

作者：Hai; Feng; MA; Shuang; SUN; Yu; Wen; WANG; Wen; Jing; ZHENG 刊期：2014年第07期

In this paper,the perturbations of the Moore–Penrose metric generalized inverses of linear operators in Banach spaces are described.The Moore–Penrose metric generalized inverse is homogeneous and nonlinear in general,and the proofs of our results are different from linear generalized inverses.By using the quasi-add...

Minimum Orders of Eulerian Oriented Digraphs with Given Diameter

作者：Yoomi; RHO; Byeong; Moon; KIM; Woonjae; HWANG; Byung; Chul; SONG 刊期：2014年第07期

A digraph D is oriented if it does not contain 2-cycles.If an oriented digraph D has a directed eulerian path,it is an oriented eulerian digraph.In this paper,when an oriented eulerian digraph D has minimum out-degree 2 and a diameter d,we find the minimum order of D.In addition,when D is 2-regular with diameter 4m(m...

Some Radius Problems Related to a Certain Subclass of Analytic Functions

作者：Oh; Sang; KWON; Young; Jae; SIM; Nak; Eun; CHO; H.; M.; SRIVASTAVA 刊期：2014年第07期

On the Constant Metric Dimension of Generalized Petersen Graphs P（n, 4）

作者：Saba; NAZ; Muhammad; SALMAN; Usman; ALI; Imran; JAVAID; Syed; Ahtsham-ul-Haq; BOKHARY 刊期：2014年第07期

在这份报纸，我们考虑概括彼得森图 P 的家庭(n， 4 ) 。我们证明 P 的公制的尺寸(n， 4 ) 当时，是 3 n 0 (现代派 4 ) ，并且当时，是 4 n = 4k + 3 (k 是平的) 。为 n 1,2 (现代派 4 ) 并且 n = 4k + 3 (k 是奇怪的) ，我们证明 P 的公制的尺寸(n， 4 ) 被 4 上面围住。这显示出概括彼得森图 P 的家庭的那张各个图(n， 4 ) 经常的公制的尺寸...

On the Blowup Phenomenon for N-coupled Focusing Schrdinger System in R~d(d≥3)

作者：Xing; Dong; TANG; Ji; Hui; ZHANG 刊期：2014年第07期

We study blow-up,global existence and ground state solutions for the N-coupled focusing nonlinear Schr¨odinger equations.Firstly,using the Nehari manifold approach and some variational techniques,the existence of ground state solutions to the equations(CNLS) is established.Secondly,under certain conditions,finite tim...

Boundedness of Multilinear Caldern–Zygmund Singular Operators on Morrey–Herz Spaces with Variable Exponents

作者：Yan; LU; Yue; Ping; ZHU 刊期：2014年第07期

In this paper,we introduce Morrey–Herz spaces M K˙(·)q,p(·)(Rn) with variable exponents α(·) and p(·),and prove the boundedness of multilinear Caldern–Zygmund singular operators on the product of these spaces.

Hypersurfaces with Isotropic Para-Blaschke Tensor

作者：Jian; Bo; FANG; Kun; ZHANG 刊期：2014年第07期

Let Mnbe an n-dimensional submanifold without umbilical points in the(n + 1)-dimensional unit sphere Sn+1.Four basic invariants of Mnunder the Moebius transformation group of Sn+1are a 1-form Φ called moebius form,a symmetric(0,2) tensor A called Blaschke tensor,a symmetric(0,2) tensor B called Moebius second fundame...

On Marcinkiewicz Integrals Associated to Compound Mappings with Rough Kernels

作者：Feng; LIU; Huo; Xiong; WU 刊期：2014年第07期

Fixed Points of Multivalued Using a Faster Quasi-nonexpansive Mappings Iterative Process

作者：Safeer; Hussain; KHAN; Mujahid; ABBAS; Sartaj; ALI 刊期：2014年第07期

In this article,we prove some strong and weak convergence theorems for quasi-nonexpansive multivalued mappings in Banach spaces.The iterative process used is independent of Ishikawa iterative process and converges faster.Some examples are provided to validate our results.Our results extend and unify some results in t...

A Sharp Nonasymptotic Bound and Phase Diagram of L1/2 Regularization

作者：Hai; ZHANG; Zong; Ben; XU; Yao; WANG; Xiang; Yu; CHANG; Yong; LIANG 刊期：2014年第07期

Weighted Pseudo Almost Periodic Solutions of N-th Order Neutral Differential Equations with Piecewise Constant Arguments

作者：Rong; Kun; ZHUANG; Rong; YUAN 刊期：2014年第07期

在这个工作，我们第 n 份订单的加权的假几乎周期的解决方案的现在的一些存在定理有借助于相关差别方程的加权的假几乎周期的解决方案的 piecewise 常数争论的中立微分方程。

Criterion of Semi-Markov Dependent Risk Model

作者：Xiao; Yun; MO; Xiang; Qun; YANG 刊期：2014年第07期

A rigorous definition of semi-Markov dependent risk model is given.This model is a generalization of the Markov dependent risk model.A criterion and necessary conditions of semiMarkov dependent risk model are obtained.The results clarify relations between elements among semi-Markov dependent risk model more clear and...