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1.
超球级数所定义整函数的型函数   总被引:1,自引:0,他引:1  
王安斌  王小红 《数学研究》2005,38(2):200-207
研究了零阶与有限正阶超球级数的型函数,得出了超球级数的阶、最大模与型函数所对应的型之间的关系式.  相似文献   

2.
本文引进了单位超球上两个全纯函数的Hadamard乘积的概念,发现这个乘积在单位多圆柱上全纯,然后证明了几个Littlewood-Paley型定理,用它们作工具,得到了H~p函数的Hadamard乘积的进一步的性质,还得到了球上Bloch函数的一个新的特征。  相似文献   

3.
王安斌  王小红 《数学研究》2008,41(3):325-332
给出了超球级数所定义整函数的下阶、下型与极大项、中心指标、最大模之间的关系及几个不等式,并由此推出了超球级数成正规增长的充要条件及成完全正规增长的充要条件.  相似文献   

4.
基于分块矩阵的Schur补和Albert定理,证明了一些含有块Hadamard积的行列式不等式,并且用不同于文献的方法证明了半正定Hermitian矩阵块Hadamard积的行列式不等式的一个猜想,此结果推广了半正定Hermitian矩阵在块Hadamard积下的Oppenheim不等式.  相似文献   

5.
本文将Hadamard矩阵乘积引入到非线性数值计算,获得了简单的矩阵形式的非线性代数模拟方程,利用Hadamard矩阵乘积和Hadamard矩阵函数的方法,我们能够容易地构造快速收敛的简单迭代法解非线性代数方程组的迭代公式,使该法成为与Newton-Raphson法相比有竞争力的方法,我们也首次定义了一种新的特殊矩阵乘积—SJT矩阵乘积。运用SJT积,我们能够方便高效的计算Newton-Raphson法中Jacobi导数矩阵的精确解,利用Hadamard矩阵乘积的范数性质,我们也导出了非线性计算摄动误差的分析公式,此外,Hadamard积和SJT积能够被用于非线性数值解耦计算,这极大地减少了求解耦合的非线性偏微分方程组的计算工作量和内存需要量。  相似文献   

6.
樊树平  段五朵 《大学数学》2006,22(2):112-114
研究亚正定矩阵kronecker积的亚正定性,得到了一个充要条件,同时得到Hadamard积亚正定性的一个充要条件.  相似文献   

7.
A=[aij]∈Mn和B=[b(ij(]∈Mn的Hadamard积可表示为AoB=[aijbij]∈Mn.如果A,B∈Mn是M-矩阵,那么AoB-1也是M-矩阵.证明了(a)一个非奇异的M-matrix是一对M-矩阵和逆M-矩阵的Hadamard积,同时也证明了(b)一个P-矩阵是两个P-矩阵的Hadamard积.  相似文献   

8.
本文研究了广义超度量矩阵的封闭性质.证明了若A为非奇异的广义超度量矩阵,则A与A的转置的Hadamard积仍然是一个广义超度量矩阵,并且它的逆矩阵是一个对角占优的M矩阵.给出了两个广义超度量矩阵Hadamard积封闭的一个充分条件.最后,讨论了广义超度量矩阵的Perron补与和的封闭条件.  相似文献   

9.
关于超球级数的增长性质   总被引:6,自引:0,他引:6       下载免费PDF全文
本文给出了超球级数所定义的整函数的极大项μ(a),中心指标υ(a),极大模M(a)的增长关系及它们之间的不等式,还讨论了正规增长性。  相似文献   

10.
陈文忠 《数学学报》1979,22(2):244-246
<正> 1.设f(z)是二个具有单位收敛圓的解析函数,级数称为f(z)与g(z)的Hadamard乘积,根据Hadamard乘积定理(可参看[1]第四章4.6),(f*g)(z)也是一个具有单位收敛圓的解析函数.  相似文献   

11.
王欣欣 《大学数学》2003,19(4):101-104
证明了实对称正定矩阵或实对称半正定矩阵与 M-矩阵的 Hadamard乘积满足实对称正定矩阵 Hadamard乘积的 Oppenheim不等式 .  相似文献   

12.
Applying the properties of Hadamard core for totally nonnegative matrices, we give new lower bounds of the determinant for Hadamard product about matrices in Hadamard core and totally nonnegative matrices, the results improve Oppenheim inequality for tridiagonal oscillating matrices obtained by T. L. Markham.  相似文献   

13.
Schur定理规定了半正定矩阵的Hadamard乘积的所有特征值的整体界限,Eric Iksoon lm在同样的条件下确定了每个特征值的特殊的界限,本文给出了Hermitian矩阵的Hadamard乘积的每个特征值的估计,改进和推广了I.Schur和Eric Iksoon Im的相应结果。  相似文献   

14.
In this paper we characterize hypersurfaces for which their Hadamard product is still a hypersurface Then we study hypersurfaces and, more generally, varieties which are idempotent under Hadamard powers.  相似文献   

15.
Additive Hadamard cocycles are a natural generalization of presemifields. In this paper, we study divisible designs and semi-regular relative difference sets obtained from additive Hadamard cocycles. We show that the designs obtained from additive Hadamard cocycles are flag transitive. We introduce a new product construction of Hadamard cocycles. We also study additive Hadamard cocycles whose divisible designs admit a polarity in which all points are absolute. Our main results include generalizations of a theorem of Albert and a theorem of Hiramine from presemifields to additive Hadamard cocycles. At the end, we generalize Maiorana-McFarland?s construction of bent functions to additive Hadamard cocycles.  相似文献   

16.
In the present paper, we derive some third-order differential subordination results for analytic functions in the open unit disk, using the operator Bcκf by means of normalized form of the generalized Bessel functions of the first kind, which is defined as z(Bcκ+1f(z))′= κBcκf(z)-(κ- 1)Bcκ+1f(z),where b, c, p ∈ C and κ = p +(b + 1)/2 ∈ C \ Z-0(Z-0= {0,-1,-2, ··· }). The results are obtained by considering suitable classes of admissible functions. Various known or new special cases of our main results are also pointed out.  相似文献   

17.
In this paper we ask which norms on Md induced by an absolute vector norm are sub-multiplicative with respect to the Hadamard product. We provide a simple necessary condition for submultiplicativity. We demonstrate that each norm on Md induced by an lp norm Hadamard submultiplicative and that the norms induced by certain polyhedral norms are Hadamard submultiplicative. We also consider some related inequalities.  相似文献   

18.
Some new lower bounds for the minimum eigenvalue of the Hadamard product of an M-matrix and its inverse are given. These bounds improve the results of [H.B. Li, T.Z. Huang, S.Q. Shen, H. Li, Lower bounds for the minimum eigenvalue of Hadamard product of an M-matrix and its inverse, Linear Algebra Appl. 420 (2007) 235-247].  相似文献   

19.
《分析论及其应用》2014,(4):369-376
In this paper, by making use of the Hadamard products, we obtain some subordination results for certain family of meromorphic functions defined by using a new linear operator.  相似文献   

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