共查询到20条相似文献,搜索用时 265 毫秒
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《数学的实践与认识》2016,(17)
给出Toric环、Toric理想的概念,利用已知的Grbner基求配置矩阵A的Toric理想I_A的Grbner基.特别对一类无法用计算机计算其Grbner基的理想I_(A_d),给出了它的Grbner基的具体形式并通过实例验证其结论. 相似文献
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ZHOU Hong-tao 《数学杂志》2012,32(4)
本文主要研究了诺特赋值环上多项式理想的Gr(o)bner基的性质.利用Buchberger算法,证明了约化Gr(o)bner基的存在性及当其首项系数为单位元时的唯一性.推广了极小Gr(o)bner基和约化Gr(o)bner基的概念.同时,我们给出了求极小Gr(o)bner基和约化Gr(o)bner基的算法. 相似文献
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本文主要研究了诺特赋值环上多项式理想的Grbner基的性质.利用Buchberger算法,证明了约化Grbner基的存在性及当其首项系数为单位元时的唯一性.推广了极小Grbner基和约化Grbner基的概念.同时,我们给出了求极小Grbner基和约化Grbner基的算法. 相似文献
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基于2008年Zhou和Winkler给出的计算有限生成的差分-微分双滤模的希尔伯特多项式的算法,文章构造了差分-微分模上相对多个序的的Gr(o)bner基,并给出和证明了计算这种Gr(o)bner基的算法.作为其应用,给出了计算差分-微分模的多变量维数多项式的新算法.推广了Zhou和Winkler (2008)所得结果,也推进了Levin (2007)所得结果. 相似文献
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Gr?bner基算法是在计算机辅助设计和机器人学、信息安全等领域广泛应用的重要工具.文章在周梦和Winkler(2008)给出的差分-微分模上Gr?bner基算法和差分-微分维数多项式算法基础上,进一步研究了分别差分部分和微分部分的双变元维数多项式算法.在循环差分-微分模情形,构造和证明了利用差分-微分模上Gr?bner基计算双变元维数多项式的算法. 相似文献
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基于2008年Zhou和Winkler给出的计算有限生成的差分-微分双滤模的希尔伯特多项式的算法,文章构造了差分-微分模上相对多个序的的Grbner基,并给出和证明了计算这种Grbner基的算法.作为其应用,给出了计算差分-微分模的多变量维数多项式的新算法.推广了Zhou和Winkler(2008)所得结果,也推进了Levin(2007)所得结果. 相似文献
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Kunyang Wang Feng Dai 《分析论及其应用》2007,23(1):50-63
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. 相似文献
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H. H. Cuenya M.D. Lorenzo C. N. Rodriguez 《分析论及其应用》2007,23(2):162-170
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. 相似文献
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Yuxian Zheng 《分析论及其应用》2006,22(2):136-140
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. 相似文献
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《计算数学》2014,(2)
<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 相似文献
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《中国科学 数学(英文版)》2014,(8)
<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 相似文献
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W.M.Shah A.Liman 《分析论及其应用》2004,20(1):16-27
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. 相似文献
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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). 相似文献
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A.Al-Shuaibi F.Al-Rawjih 《分析论及其应用》2004,20(1):28-34
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. 相似文献
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Francois Chaplais 《分析论及其应用》2006,22(4):301-318
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. 相似文献