共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
马志良(1947—),男,浙江普陀人,浙江普陀高级教师圆锥曲线c:f(x,y)=0(1)关于点P(x0,y0)对称的曲线c′的方程为:f(2x0-x,2y0-y)=0(2)利用方程(2)可求曲线c在点P(x0,y0)处的切线方程和圆锥曲线c以P(x0,y0)为中点的弦所在的直线方程.(1)-(2),得f(x,y... 相似文献
3.
Hong Jun YUAN Song Zhe LIAN Chun Ling CAO Wen Jie GAO Xiao Jing XU 《数学学报(英文版)》2007,23(10):1751-1756
The aims of this paper are to discuss the extinction and positivity for the solution of the initial boundary value problem and Cauchy problem of ut = div([↓△u^m|p-2↓△u^m). It is proved that the weak solution will be extinct for 1 〈 p ≤ 1 + 1/m and will be positive for p 〉 1 + 1/m for large t, where m 〉 0. 相似文献
4.
15个著名的不定方程问题 总被引:3,自引:0,他引:3
15个著名的不定方程问题杨仕椿(四川西充县常林中学637200)不定方程的研究,是数论研究中的热点与难点,它以其内容简洁易懂而方法艰深困难向人类的智慧提出挑战.除了著名的Fer-mat大定理外,还有许多的其它不定方程问题,本文列举出15个问题,逐一阐... 相似文献
5.
沈惠川 《数学物理学报(A辑)》1996,16(1):40-47
该文将等熵磁流体力学(MHD)或等熵电磁流体力学(EMHD)的基本方程组以及(非相对论的或相对论的)Vlasov方程,分别化为等熵流体力学(HD)表象,建立了上述三类等熵方程之间的对应关系.从而使非相对论Vlasov方程的精确解(它与等熵MHD方程的精确解相对应)和相对论Vlasov方程的精确解(它与等熵EMHD方程的精确解相对应)都可以用(非相对论的和相对论的)等熵HD方程的精确解来表示. 相似文献
6.
8.
Lax方程组的求解公式 总被引:1,自引:0,他引:1
本文给出了一些著名的非线性演化方程的Lax方程组求解公式.利用这些公式,只需算积分就能不断求得这些方程的解.从而提供了利用Lax方程组求解非线性方程的新途径. 相似文献
9.
AGLOBALALGORITHMINTHENUMERICALRESOLUTIONOFTHEVISCOUS/INVISCIDCOUPLEDPROBLEMXUCHUANJUMADAY,Y.ManuscriptreceivedOctober17,19... 相似文献
10.
11.
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
12.
《数学学报(英文版)》2014,(10)
<正>Submission Authors must use LaTeX for typewriting,and visit our website www.actamath.com to submit your paper.Our address is Editorial Office of Acta Mathematica Sinica,Academy of Mathematics and Systems Science,Chinese Academy of Sciences,Beijing 100190,P.R.China. 相似文献
13.
14.
《运筹学学报》2014,(3)
正August 10-14,2015Beijin,China The 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
15.
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
16.
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
17.
《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
18.
19.
《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
20.
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