共查询到19条相似文献,搜索用时 953 毫秒
1.
2.
3.
4.
非奇异H矩阵的实用充分条件 总被引:46,自引:2,他引:44
In this paper, several practical sufficient conditions for nonsinguular H-matrices are obtained by comparing the elements of a matrix. Advantage of results obtained is illustrated by a numerical example. 相似文献
5.
6.
利用α2-双对角占优理论,给出了几个判定非奇异H-矩阵的充分条件,扩大了非奇异H-矩阵的判定范围,并给出了相应的数值算例说明结果的有效性. 相似文献
7.
岳嵘 《数学的实践与认识》2012,42(19)
非奇H-矩阵在数值分析和矩阵理论的研究中非常重要,但实际判定一个非奇异H-矩阵却非常困难.给出一类非奇异H-矩阵新的判定条件,改进了近期的相关结果,并用数值例子说明了结果判定范围的更广泛性. 相似文献
8.
9.
通过对方阵行下标集不同的递进式划分,我们获得了H-矩阵几个新的判别法,进而给出H-矩阵的迭代判别法,最后利用数值例子说明这些判别法的有效性. 相似文献
10.
Fuzzy标准矩阵及Fuzzy强标准矩阵 总被引:2,自引:0,他引:2
本文在格L=[0,1]上定义了Fuzzy标准矩阵及Fuzzy强标准矩阵,得出了他们的一些基本性质。证明了Fuzzy标准矩阵是幂收敛阵;给出了Fuzzy强标准矩阵的判别条件及Fuzzy强标准矩阵是幂等的充要条件。最后对Fuzzy强标准矩阵的秩进行了讨论。 相似文献
11.
Yu Ping Song 《数学学报(英文版)》2014,30(1):169-180
An umbilical free oriented hypersurfacex:M→Rnwith non-zero principal curvatures is called a Laguerre isoparametric hypersurface if its Laguerre form C=i Ciωi=iρ1(Ei(logρ)(r ri)Ei(r))ωi vanishes and Laguerre shape operator S=ρ1(S 1 rid)has constant eigenvalues.Hereρ=i(r ri)2,r=r1+r2+···+rn 1n 1is the mean curvature radius andSis the shape operator ofx.{Ei}is a local basis for Laguerre metric g=ρ2III with dual basis{ωi}and III is the third fundamental form ofx.In this paper,we classify all Laguerre isoparametric hypersurfaces in Rn(n〉3)with two distinct non-zero principal curvatures up to Laguerre transformations. 相似文献
12.
对强连通有向图D的一个非空顶点子集S,D中包含S的具有最少弧数的强连通有向子图称为S的Steiner子图,S的强Steiner距离d(S)等于S的Steiner子图的弧数. 如果|S|=k, 那么d(S)称为S的k-强距离. 对整数k≥2和强有向图D的顶点v,v的k-强离心率sek(v)为D中所有包含v的k个顶点的子集的k-强距离的最大值. D中顶点的最小k-强离心率称为D的k-强半径,记为sradk(D),最大k-强离心率称为D的k-强直径,记为sdiamk(D). 本文证明了,对于满足k+1≤r,d≤n的任意整数r,d,存在顶点数为n的强竞赛图T′和T″,使得sradk(T′)=r和sdiamk(T″)=d;进而给出了强定向图的k-强直径的一个上界. 相似文献
13.
In this paper, an urban economic growth model with endogenous infrastructure allocation is given by introducing the two-variable utility function for city's inhabitant. A twodimensional dynamical system is obtained by solving the utility maximization problem and it is proved that this system has the unique non-zero equilibrium which is a saddle. The model has the unique optimal growth and an optimal rate of infrastructure allocation. 相似文献
14.
Abstract In this article, we introduce the concepts of strongly statistically convergent sequence and strong statistically Cauchy sequence in a probabilistic metric (PM) space endowed with the strong topology, and establish some basic facts. Next, we define the strong statistical limit points and the strong statistical cluster points of a sequence in this space and investigate the relations between these concepts. 相似文献
15.
Consider a two-stage non-cooperative Cournot game with location choice involving two firms. There aren spatially separated markets located at the vertices of a network. Each firm, first selects the location of a facility and
then selects the quantities to supply to the markets in order to maximize its profit. Non-zero conjectural variation at the
second stage is studied. Equilibrium in the quantities offered by each firm in the markets exists. Furthermore, when the demand
in each market is sufficiently large, each firm chooses to locate its facility at the vertices.
Partially financed by FEDER and Ministerio de Ciencia y Tecnología, grant BFM2002-04525-C02-01, and Universidad de Las Palmas
de Gran Canaria, grant UNI2004/12 相似文献
16.
关于非零解与固有元的若干问题 总被引:5,自引:0,他引:5
本文用适当的fp-同伦方法,构造若干特定泛函,在边界条件(MS,A,a,C )与(CS;A,a)等的支持下,研究一类集要值映象方程的非零解,固有元等有关问题,发展了Smart,Potter Browder等及作者的某些结果。 相似文献
17.
Yu Ping SONG 《数学学报(英文版)》2014,(1)
An umbilical free oriented hypersurfacex:M→Rnwith non-zero principal curvatures is called a Laguerre isoparametric hypersurface if its Laguerre form C=i Ciωi=iρ1(Ei(logρ)(r ri)Ei(r))ωi vanishes and Laguerre shape operator S=ρ1(S 1 rid)has constant eigenvalues.Hereρ=i(r ri)2,r=r1+r2+···+rn 1n 1is the mean curvature radius andSis the shape operator ofx.{Ei}is a local basis for Laguerre metric g=ρ2III with dual basis{ωi}and III is the third fundamental form ofx.In this paper,we classify all Laguerre isoparametric hypersurfaces in Rn(n3)with two distinct non-zero principal curvatures up to Laguerre transformations. 相似文献
18.
n进制中非零数字之积函数的均值公式 总被引:8,自引:0,他引:8
设 N =a1nk1+ a2 nk2 +… + asnks( 1 aik2 >… >ks 0 ) ,a( N,n) =a1a2 … as,本文给出了均值 Ar( N ,n) =∑m相似文献