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    20 April 2007, Volume 27 Issue 2 Previous Issue    Next Issue
    Articles
    CANNOT ISOMETRICALLY CONTAIN SOME THREE-DIMENSIONAL SUBSPACES#br# OF AM-SPACES
    Ding Guanggui
    Acta mathematica scientia,Series B. 2007, 27 (2):  225-231.  DOI: 10.1016/S0252-9602(07)60021-6
    Abstract ( 1550 )   RICH HTML PDF (141KB) ( 1351 )   Save

    This article presents a novel method to prove that: let E be an AM-space and if dim E≥ 3, then there does not exist any odd subtractive isometric mapping from the unit sphere S(E) into $S[L(\Omega,\mu)]$. In particular, there does not exist any real linear isometry from E into $L(\Omega,\mu)$.

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    THE ASYMPTOTIC DISTRIBUTIONS OF EMPIRICAL LIKELIHOOD RATIO STATISTICS IN THE PRESENCE OF MEASUREMENT ERROR
    Wu Changchun; Zhang Runchu
    Acta mathematica scientia,Series B. 2007, 27 (2):  232-242.  DOI: 10.1016/S0252-9602(07)60022-8
    Abstract ( 1252 )   RICH HTML PDF (169KB) ( 840 )   Save

    Suppose that several different imperfect instruments and one perfect instrument are independently used to measure some characteristics of a population. Thus, measurements of two or more sets of samples with varying accuracies are obtained. Statistical inference should be based on the pooled samples. In this article, the authors also assumes that all the imperfect instruments are unbiased. They consider the problem of combining this information to make statistical tests for parameters more relevant. They define the empirical likelihood ratio functions and obtain their asymptotic
    distributions in the presence of measurement error.

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    A GLOBAL LINEAR AND LOCAL QUADRATIC SINGLE--STEP NONINTERIOR#br# CONTINUATION METHOD FOR MONOTONE SEMIDEFINITE COMPLEMENTARITY PROBLEMS
    Zhang Liping
    Acta mathematica scientia,Series B. 2007, 27 (2):  243-253.  DOI: 10.1016/S0252-9602(07)60023-X
    Abstract ( 1190 )   RICH HTML PDF (174KB) ( 1315 )   Save

    A noninterior continuation method is proposed for semidefinite
    complementarity problem (SDCP). This method improves the
    noninterior continuation methods recently developed for SDCP by
    Chen and Tseng. The main properties of our method are: (i) it is
    well defined for the monotones SDCP; (ii) it has to solve just one
    linear system of equations at each step; (iii) it is shown to be
    both globally linearly convergent and locally quadratically
    convergent under suitable assumptions.

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    SOME EULER SPACES OF DIFFERENCE SEQUENCES OF ORDER m
    Harun Polat; Feyzi Basar
    Acta mathematica scientia,Series B. 2007, 27 (2):  254-266.  DOI: 10.1016/S0252-9602(07)60024-1
    Abstract ( 1329 )   RICH HTML PDF (206KB) ( 2667 )   Save

    Kizmaz [13] studied the difference sequence spaces $\ell_\infty(\Delta),~c(\Delta)$, and $c_0(\Delta)$. Several article dealt with the sets of sequences of $m$-th order difference of which are bounded, convergent, or convergent to zero. Altay and Ba\c sar [5] and Altay, Ba\c sar, and Mursaleen [7] introduced the Euler sequence spaces $e_0^r$, $e_c^r$, and $e_\infty^r$, respectively. The main purpose of this article is to introduce the spaces $e_0^r(\Delta^{(m)})$, $e_c^r(\Delta^{(m)})$, and $e_\infty^r(\Delta^{(m)})$ consisting of all sequences whose $m^{th}$ order differences are in the Euler spaces $e_0^r$, $e_c^r$, and $e_\infty^r$, respectively. Moreover, the authors give some topological properties and inclusion relations, and determine the $\alpha$-, $\beta$-, and $\gamma$-duals of the spaces $e_0^r(\Delta^{(m)})$, $e_c^r(\Delta^{(m)})$, and $e_\infty^r(\Delta^{(m)})$, and the Schauder basis of the spaces $e_0^r(\Delta^{(m)})$, $e_c^r(\Delta^{(m)})$. The last section of the article is devoted to the characterization of some matrix mappings on the sequence space $e_c^r(\Delta^{(m)})$.

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    THE RANDOM SHIFT SET AND RANDOM SUB-SELF-SIMILAR SET
    Hu Dihe; Zhang Xiaomin
    Acta mathematica scientia,Series B. 2007, 27 (2):  267-273.  DOI: 10.1016/S0252-9602(07)60025-3
    Abstract ( 1263 )   RICH HTML PDF (151KB) ( 1212 )   Save

    First of all the authors introduce the concepts of random sub-self-similar set and random shift set and then construct the random sub-self-similar set by a random shift set and a collection of statistical contraction operators.

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    THE EXISTENCE OF GLOBAL SOLUTION AND THE BLOWUP PROBLEM FOR SOME p-LAPLACE HEAT EQUATIONS
    Wang Yang
    Acta mathematica scientia,Series B. 2007, 27 (2):  274-282.  DOI: 10.1016/S0252-9602(07)60026-5
    Abstract ( 981 )   RICH HTML PDF (173KB) ( 1389 )   Save

    This article consider, for the following
    heat equation
    $$\left\{
    \begin{array}{ll}
    \displaystyle\frac{u_t}{|x|^s}-\Delta_p u=u^q ,\ \ &(x,t) \in \Omega
    \times (0,T),\\
    u(x,t)= 0 ,&(x,t) \in \partial \Omega\times(0,T) ,\\
    u(x,0)=u_0(x) ,& u_0(x)\ge 0,\quad u_0(x)\not\equiv0
    \end{array}
    \right. $$
    the existence of global solution under some conditions and give two sufficient conditions
    for the blow up of local solution in finite time, where $\Omega$ is a smooth bounded domain
    in $R^N(N >p)$, $0\in \Omega ,\Delta_p u={\rm div}(|\nabla u|^{p-2}\nabla u),0\le s\le 2,
    p\ge 2, p-1

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    ON THE LIMITING BEHAVIOR OF THE MAXIMUM PARTIAL SUMS FOR ARRAYS OF ROWWISE NA RANDOM VARIABLES
    Gan Shixin; Chen Pingyan
    Acta mathematica scientia,Series B. 2007, 27 (2):  283-290.  DOI: 10.1016/S0252-9602(07)60027-7
    Abstract ( 1214 )   RICH HTML PDF (151KB) ( 1395 )   Save

    Let {Xni, 1≤ n,i<∞} be an array of rowwise NA random variables and
    {an,n≥1} a sequence of constants with 0n↑∞. The limiting behavior of maximum partial sums $\frac{1}{a_n}\max\limits_{1\leq k\leq n}|\sum\limits^k_{i=1}X_{ni}|$ is investigated and some new results are obtained. The results extend and improve the corresponding theorems of rowwise independent random variable arrays by Hu and Taylor [1] and
    Hu and Chang [2].

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    DEFICIENT FUNCTIONS OF RANDOM DIRICHLET SERIES
    Zhou Junying; Sun Daochun
    Acta mathematica scientia,Series B. 2007, 27 (2):  291-296.  DOI: 10.1016/S0252-9602(07)60028-9
    Abstract ( 1167 )   RICH HTML PDF (137KB) ( 942 )   Save

    In this article, the uniqueness
    theorem of Dirichlet series is proved. Then the random Dirichlet series
    in the right half plane is studied, and the result that the random Dirichlet
    series of finite order has almost surely(a.s.) no deficient functions is proved.

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    QUASI-PERMUTATION REPRESENTATIONS OF ALTERNATING AND SYMMETRIC GROUPS
    Houshang Behravesh; Mohammad Hossein Jafari
    Acta mathematica scientia,Series B. 2007, 27 (2):  297-300.  DOI: 10.1016/S0252-9602(07)60029-0
    Abstract ( 1082 )   RICH HTML PDF (122KB) ( 1050 )   Save

    The quantities c(G), q(G) and p(G) for finite groups were defined by H. Behravesh. In this article, these quantities for the alternating group
    A{n} and the symmetric group S{n} are calculated. It is shown that
    [c(G)=q(G)=p(G)=n,] when G= A{n} or S{n}.

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    ON DIRECT METHOD OF SOLUTION FOR A CLASS OF SINGULAR INTEGRAL EQUATIONS
    Du Zhihua; Du Jinyuan
    Acta mathematica scientia,Series B. 2007, 27 (2):  301-307.  DOI: 10.1016/S0252-9602(07)60030-7
    Abstract ( 1462 )   RICH HTML PDF (136KB) ( 1239 )   Save

    In this article, by introducing characteristic singular integral operator and
    associate singular integral equations (SIEs), the authors discuss the direct method of solution for a class of singular integral equations with certain analytic inputs. They obtain both the conditions of solvability and the solutions in closed form. It is noteworthy that the method is different from the classical one that is due to Lu.

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    GALERKIN-PETROV METHODS OF TOEPLITZ OPERATORS ON DIRICHLET SPACE
    Wang Xiaofeng; Cao Guangfu
    Acta mathematica scientia,Series B. 2007, 27 (2):  308-316.  DOI: 10.1016/S0252-9602(07)60031-9
    Abstract ( 1111 )   RICH HTML PDF (167KB) ( 1156 )   Save

    The convergence of several Galerkin--Petrov methods, including polynomial collocation and analytic element collocation methods of Toeplitz operators on Dirichlet space, is established. In particular, it is shown that such methods converge if the basis and test function own certain circular symmetry.

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    COMPLETENESS OF THE PARABOLIC SUBGROUPS OF PROJECTIVE#br# ORTHOGONAL GROUPS
    Wang Dengyin
    Acta mathematica scientia,Series B. 2007, 27 (2):  317-328.  DOI: 10.1016/S0252-9602(07)60032-0
    Abstract ( 985 )   RICH HTML PDF (182KB) ( 982 )   Save

    All parabolic subgroups and Borel subgroups of $P\Omega(2m+1,F)$ over a linearable field F of characteristic 0 are shown to be complete groups, provided m>3.

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    THE EIGENVALUE PROBLEM FOR THE LAPLACIAN EQUATIONS
    Shao Zhiqiang; Hong Jiaxing
    Acta mathematica scientia,Series B. 2007, 27 (2):  329-337.  DOI: 10.1016/S0252-9602(07)60033-2
    Abstract ( 1681 )   RICH HTML PDF (157KB) ( 2131 )   Save

    This article studies the Dirichlet eigenvalue problem for the Laplacian equations △u=-λu, $x\in \Omega$, $u=0$, $x\in\partial\Omega$, where $\Omega\subset R^{n}$ is a smooth bounded convex domain. By using the method of appropriate barrier function combined with the maximum principle, authors obtain a sharp lower bound of the difference of the first two eigenvalues for the Dirichlet eigenvalue problem. This study improves the result of S.T. Yau et al.

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    BOUNDEDNESS AND CONVERGENCE FOR THE NON-LIENARD TYPE DIFFERENTIAL EQUATION
    Zhao Liqin
    Acta mathematica scientia,Series B. 2007, 27 (2):  338-346.  DOI: 10.1016/S0252-9602(07)60034-4
    Abstract ( 1271 )   RICH HTML PDF (167KB) ( 1488 )   Save

    In this article, the author studies the boundedness and convergence for the non--Lienard type differential equation
    x' = a(y)-f(x),
    y' =b(y)β(x)-g(x)+e(t),
    where a(y), b(y), f(x), g(x), β(x) are real continuous functions in y∈ R or x ∈ R, β(x)≥ 0 for all x and e(t) is a real continuous function on R+={t: t≥ 0} such that the equation has a unique solution for the initial value problem. The necessary and sufficient conditions are obtained and some of the results in the literatures are improved and extended.

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    ASYMPTOTIC STABILITY OF RAREFACTION WAVE FOR HYPERBOLIC-ELLIPTIC COUPLED SYSTEM IN RADIATING GAS
    Ruan Lizhi; Zhang Jing
    Acta mathematica scientia,Series B. 2007, 27 (2):  347-360.  DOI: 10.1016/S0252-9602(07)60035-6
    Abstract ( 1306 )   RICH HTML PDF (176KB) ( 1505 )   Save

    In this article, authors study the Cauch problem for a model of hyperbolic-elliptic coupled system derived from the one--dimensional system of the radiating gas. By considering the initial data as a small disturbances of rarefaction wave of inviscid Burgers equation, the global existence of the solution to the corresponding Cauchy problem and asymptotic stability of
    rarefaction wave is proved. The analysis is based on a priori estimates and L2-energy method.

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    THE BOUNDEDNESS OF MULTILINEAR COMMUTATORS ON WEIGHTED SPACES#br# AND HERZ-TYPE SPACES
    Zhou Weijun; Ma Bolin; Xu Jingshi
    Acta mathematica scientia,Series B. 2007, 27 (2):  361-372.  DOI: 10.1016/S0252-9602(07)60036-8
    Abstract ( 1257 )   RICH HTML PDF (188KB) ( 1367 )   Save

    The boundedness of maximal multilinear commutator on certain weighted spaces is obtained. The boundedness of mulitilinear commutators of singular integrals with Calderon--Zygmund kernel on Herz-type spaces is also considered.

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    EVENTUAL STABILITY OF IMPULSIVE DIFFERENTIAL SYSTEMS
    Zhang Yu; Sun Jitao
    Acta mathematica scientia,Series B. 2007, 27 (2):  373-380.  DOI: 10.1016/S0252-9602(07)60037-X
    Abstract ( 1199 )   RICH HTML PDF (152KB) ( 1288 )   Save

    In this article, criteria of eventual stability are established for impulsive differential systems using piecewise continuous Lyapunov functions. The
    sufficient conditions that are obtained significantly depend on the moments
    of impulses. An example is discussed to illustrate the theorem.

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    SPHERICAL NONLINEAR PULSES FOR THE SOLUTIONS OF NONLINEAR WAVE EQUATIONS II, NONLINEAR CAUSTIC
    Yuan Mingsheng
    Acta mathematica scientia,Series B. 2007, 27 (2):  381-394.  DOI: 10.1016/S0252-9602(07)60038-1
    Abstract ( 1171 )   RICH HTML PDF (205KB) ( 873 )   Save

    This article discusses spherical pulse like solutions of the system of semilinear wave equations with the pulses focusing at a point and emerging outgoing in three space variables. In small initial data case, it shows that the nonlinearities have a strong effect at the focal point. Scattering operator is introduced to describe the caustic crossing. With the aid of the L norms, it analyzes the relative errors in approximate solutions.

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    SOME DUAL KINEMATIC FORMULAS
    Xie Fengfan; Li Deyi
    Acta mathematica scientia,Series B. 2007, 27 (2):  395-404.  DOI: 10.1016/S0252-9602(07)60039-3
    Abstract ( 1362 )   RICH HTML PDF (156KB) ( 1396 )   Save

    In this article, some kinematic formulas for dual quermassintegral of star bodies and for chord power integrals of convex bodies are established by using dual mixed volumes. These formulas are the extensions of the fundamental kinematic formula involving quermassintegral to the case of dual quermassintegral and chord power integrals.

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    OPTIMAL HARVESTING POLICY FOR INSHORE-OFFSHORE FISHERY MODEL WITH IMPULSIVE DIFFUSION
    Dong Lingzhen; Chen Lansun; Sun Lihua
    Acta mathematica scientia,Series B. 2007, 27 (2):  405-412.  DOI: 10.1016/S0252-9602(07)60040-X
    Abstract ( 1249 )   RICH HTML PDF (156KB) ( 1604 )   Save

    This article studies the inshore-offshore fishery model with impulsive diffusion. The existence and global asymptotic stability of both the trivial
    periodic solution and the positive periodic solution are obtained. The complexity of this system is also analyzed. Moreover, the optimal harvesting policy are given for the inshore subpopulation, which includes the maximum sustainable yield and the corresponding harvesting effort.

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    A NOVEL FIXED POINT THEOREM AND ITS APPLICATIONS
    Zhai Chengbo; Guo Chunmei
    Acta mathematica scientia,Series B. 2007, 27 (2):  413-420.  DOI: 10.1016/S0252-9602(07)60041-1
    Abstract ( 1685 )   RICH HTML PDF (148KB) ( 1419 )   Save

    In this article, a novel fixed point theorem in C[0,1] space is established by
    using the properties of fixed point index. This theorem is then applied to
    prove the existence of positive solutions for three-point boundary value problems and generalizes some previous results.

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    GLOBALLY BOUNDED IN-TIME SOLUTIONS TO A PARABOLIC-ELLIPTIC SYSTEM#br# MODELLING CHEMOTAXIS
    Zhong Xinhua; Jiang Song
    Acta mathematica scientia,Series B. 2007, 27 (2):  421-429.  DOI: 10.1016/S0252-9602(07)60042-3
    Abstract ( 1045 )   RICH HTML PDF (155KB) ( 1085 )   Save

    In this article, the globally bounded in-time pointwise estimate of solutions to the simplified Keller--Segel system modelling chemotaxis are derived. Moreover, a local existence theorem is obtained.

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    EXISTENCE OF GLOBAL SMOOTH SOLUTION FOR SCALAR CONSERVATION LAWS WITH DEGENERATE VISCOSITY IN 2-DIMENSIONAL SPACE
    Chen Jing; Xu Xuewen
    Acta mathematica scientia,Series B. 2007, 27 (2):  430-436.  DOI: 10.1016/S0252-9602(07)60043-5
    Abstract ( 1224 )   RICH HTML PDF (146KB) ( 975 )   Save

    This article concerns the existence of global smooth solution for scalar conservation laws with degenerate viscosity in 2-dimensional space. The analysis is based on successive approximation and maximum principle.

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    RELAXATION TIME LIMITS PROBLEM FOR HYDRODYNAMIC MODELS IN #br# SEMICONDUCTOR SCIENCE
    Li Yong
    Acta mathematica scientia,Series B. 2007, 27 (2):  437-448.  DOI: 10.1016/S0252-9602(07)60044-7
    Abstract ( 1262 )   RICH HTML PDF (182KB) ( 1594 )   Save

    In this article, two relaxation time limits, namely, the momentum relaxation time limit and the energy relaxation time limit are considered. By the compactness argument, it is obtained that the smooth solutions of the multidimensional nonisentropic Euler--Poisson problem converge to the solutions of an energy transport model or a drift diffusion model, respectively, with respect to different time scales.

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