关于单BCI—代数的一些结果

本文讨论了单BCI-代数。证明了一个BCI-代数是单的当且仅当它的子代数都是单的；给出了单p-半单BCI-代数的一种表示式；证明了一个p-半单BCI-代数是单的当且仅当它的阶是素数；这样得到了一批（无限多个）单BCI-代数；证明了商BCK-代数X/A是单的当且仅当A是X的极大理想。     

群逆伪BCI-代数与群逆滤子(英文)

伪BCK-代数是非可换模糊逻辑(蕴涵片段)的基本代数框架,伪BCI-代数是伪BCK-代数的推广,本文研究伪BCI-代数的结构。首先,借助BZ-代数(又称弱BCC-代数)给出伪BCI-代数的一个特征性质;其次,通过引入群逆伪BCI-代数的概念,研究了伪BCI-代数与(非可换)群之间的关系;接着,引入群逆滤子、优滤子和正规滤子的概念,并通过它们给出伪BCI-代数成为群逆伪BCI-代数(以及滤子成为p-滤子)的充要条件;最后,证明了如下结论:(1)平均伪BCI-代数等价于p-半单BCI-代数;(2)伪BCI-代数的每一个滤子是p-滤子,当且仅当它是群逆的且其伴随群的每一个子群是正规子群。     

超*BCI-代数的商超代数

修改了超BCI-代数的定义,提出超*BCI-代数并对其性质作了研究.在此基础上,引入超*BCI-代数的左、右扩张、正定对换超*BCI-代数及其陪集等概念,给出了正定对换超*BCI-代数的商超代数定义,y并对其商超代数的性质作了研究.     

亚BCI-代数的并代数北大核心

提出了任意一族亚BCI-代数的并代数、软集在一族亚BCI-代数的并代数上的扩展交等新概念。研究了亚BCI-代数的子结构的可并性,逆可并性以及在并代数上的一系列基本性质。同时还讨论了亚BCI-代数中新型软子结构在并代数上的基本性质。     

BCI-代数的伴随代数和a-伴随代数

研究BCI-代数与群和半群之间的关系.先用BCI-代数产生两个新代数,再反过来用这两个新代数研究BCI-代数.引入了BCI-代数的伴随代数和a-伴随代数的概念,讨论了它们的运算公式和性质,并由此给出了广义结合与广义a-结合BCI-代数的几个等价命题.推广了广义结合BCI-代数的伴随群和广义a-结合BCI-代数的伴随摩群的概念及参考文献中的一些结论.     

软BCI-代数的软固执理想

将Molodtsov的软集理论应用到BCI-代数的理想中,引进了软BCI-代数的软固执理想的概念,并给出具体实例证明了软BCI--代数的软固执理想的存在性.讨论了软BCI-代数的软固执理想与软理想的关系,给出了软BCI-代数的软固执理想的扩张性质,研究了两个软BCI-代数的软固执理想的扩展交、限制交、限制并和限制差分的性质.     

BCI-代数的伴随代数和α-伴随代数

研究BCI-代数与群和半群之间的关系.先用BCI-代数产生两个新代数,再反过来用这两个新代数研究BCI-代数.引入了BCI-代数的伴随代数和α-伴随代数的概念,讨论了它们的运算公式和性质,并由此给出了广义结合与广义α-结合BCI-代数的几个等价命题.推广了广义结合BCI-代数的伴随群和广义α-结合BCI-代数的伴随摩群的概念及参考文献中的一些结论.     

软可换BCI-代数

将软集合理论应用到可换BCI-代数中,给出了软可换BCI-代数的概念,讨论了软可换BCI-代数和软BCI-代数之间的关系,研究了软可换BCI-代数的扩展交、限制交、限制并以及限制差分等性质.最后,研究了软可换BCI-代数的同态性质.     

亚BCI-代数的$(\alpha,\beta)$-软理想

首先将软集的参数集赋予亚BCI-代数, 给出了亚BCI-代数的$(\alpha,\beta)$-软理想的概念.当$U=[0,1], \alpha=U, \beta=\phi$时,相应地就得到了亚BCI-代数的犹豫模糊理想的概念.研究了亚BCI-代数的$(\alpha,\beta)$-软理想的一些重要性质.最后讨论了亚BCI-代数的$(\alpha,\beta)$-软理想的同态像和原像的性质.     

BCI-代数的Fuzzy广义结合理想

引入了BCI-代数的fuzzy广义结合理想的概念，给出了它的一种刻画，讨论了fuzzy广义结合理想与其它fuzzy理想的关系，并利用fuzzy广义结合理想得到了拟结合BCI-代数成为结合BCI-代数的几个特征。     

RECENT PROGRESS ON SPHERICAL HARMONIC APPROXIMATION MADE BY BNU RESEARCH GROUP ——In memory of Professor Sun Yongsheng

As early as in 1990, Professor Sun Yongsheng, suggested his students at Beijing Normal University to consider research problems on the unit sphere. Under his guidance and encouragement his students started the research on spherical harmonic analysis and approximation. In this paper, we incompletely introduce the main achievements in this area obtained by our group and relative researchers during recent 5 years （2001-2005）. The main topics are： convergence of Cesaro summability, a.e. and strong summability of Fourier-Laplace series; smoothness and K-functionals; Kolmogorov and linear widths.     

A unified approach to certain problems of best local approximation

In this paper we study best local quasi-rational approximation and best local approximation from finite dimensional subspaces of vectorial functions of several variables. Our approach extends and unifies several problems concerning best local multi-point approximation in different norms.     

Boundedness for commutators of multipliers on Hardy type spaces

In this paper, we study the commutators generalized by multipliers and a BMO function. Under some assumptions, we establish its boundedness properties from certain atomic Hardy space Hb^p（R^n） into the Lebesgue space L^p with p 〈 1.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

<正>August 10-14,2015Beijing,ChinaThe International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

Towards Excellence in Science Chinese Academy of Sciences

<正>May 26,2014,Beijing Science is a human enterprise in the pursuit of knowledge.The scientific revolution that occurred in the 17th Century initiated the advances of modern science.The scientific knowledge system created by     

Bounds for the zeros of polynomials

Let P(z)=∑↓j=0↑n ajx^j be a polynomial of degree n. In this paper we prove a more general result which interalia improves upon the bounds of a class of polynomials. We also prove a result which includes some extensions and generalizations of Enestrǒm-Kakeya theorem.     

Boundedness of commutators related to Marcinkiewicz integrals on hardy type spaces

In this paper, the authors study the boundedness of the operator [μΩ, b], the commutator generated by a function b ∈ Lipβ(Rn)(0 ＜β≤ 1) and the Marcinkiewicz integrals μΩ, on the classical Hardy spaces and the Herz-type Hardy spaces in the case Ω∈ Lipα(Sn-1)(0 ＜α≤ 1).     

Jacobi polynomials used to invert the laplace transform

Given the Laplace transform F(s) of a function f(t), we develop a new algorithm to find an approximation to f(t) by the use of the classical Jacobi polynomials. The main contribution of our work is the development of a new and very effective method to determine the coefficients in the finite series expansion that approximation f(t) in terms of Jacobi polynomials. Some numerical examples are illustrated.     

Generalization of the interaction between Haar approximation and polynomial operators to higher order methods

In applications it is useful to compute the local average empirical statistics on u. A very simple relation exists when of a function f（u） of an input u from the local averages are given by a Haar approximation. The question is to know if it holds for higher order approximation methods. To do so, it is necessary to use approximate product operators defined over linear approximation spaces. These products are characterized by a Strang and Fix like condition. An explicit construction of these product operators is exhibited for piecewise polynomial functions, using Hermite interpolation. The averaging relation which holds for the Haar approximation is then recovered when the product is defined by a two point Hermite interpolation.