共查询到20条相似文献,搜索用时 15 毫秒
1.
N. D. Podufalov 《Algebra and Logic》2002,41(1):47-58
Using spread sets that define finite translation planes, we construct functions that map a finite linear space into itself. Properties of such functions, which are of interest from the standpoint of cryptography, are examined. We look into the relationship between these functions and corresponding translation planes. 相似文献
2.
Under some general assumptions on weight, we give a complete characterization of the Cauchy transform of continuous linear functionals on the weighted spaces of holomorphic functions in a ball. We construct an integral projection that sends the weighted spaces of measurable and n-harmonic functions in the ball onto the corresponding spaces of holomorphic functions. 相似文献
3.
在实赋范空间上通过范数导数(左、右两个)引进一种广义内积(上、下两个),并用它们对实赋范空间上的线性连续泛函给出上、下估计式。本文主要结果揭示了实赋范空间上的如下三类连续线性泛函的统一性。第一类连续线性泛函是指其中每一个f都在闭单位球上取到其范数值f。第二类连续线性泛函是指其中第一个f的核Ker(f)与另一空间元素之间的最佳逼近元存在。第三类连续性泛函是指其中每一个f的上限和下限分别可用上、下两种 相似文献
4.
Suppose that AmLp(D,) is the space of all m-analytic functions on the disk D={z:|z| < 1} which are pth power integrable over area with the weight (1-|z|2), > -1. In the paper, we introduce subspaces AkLp
0(D,), k=1,2,...,m, of the space A
mLp(D,) and prove that A
mLp(D,) is the direct sum of these subspaces. These results are used to obtain growth estimates of derivatives of polyanalytic functions near the boundary of arbitrary domains. 相似文献
5.
JIANG Nian-sheng Chen Zi-li.Department of Computer Science Mathematics Chongqing Three Gorges College Chongqing China .Department of Applied Mathematics Southwest Jiaotong University Chengdu China 《数学季刊》2004,19(1):51-56
In this paper we present some characterizations of Banach function spaces on which every continuous linear operator is regular. 相似文献
6.
We obtain sufficient conditions for the continuity of the general nonlinear superposition operator (generalized Nemytskii operator) acting from the space
of differentiable functions on a bounded domain
to the Lebesgue space
. The values of operators on a function
are locally determined by the values of both the function
itself and all of its partial derivatives up to order
inclusive. In certain particular cases, the sufficient conditions obtained are proved to be necessary as well. The results are illustrated by several examples, and an application to the theory of Sobolev spaces is also given. 相似文献
7.
8.
Klaus Metsch 《Designs, Codes and Cryptography》1997,10(2):251-263
We show that every non-degenerate planar space with v points and planes can be embedded as a linear space into PG(3,q) for some prime power q provided that 1000( - v) v5/6; 相似文献
9.
Malcolm Greig 《Designs, Codes and Cryptography》2002,27(1-2):25-47
Batten and Beutelspacher have characterized Finite Linear Spaces with lines of size n,n + 1 and n + 2, and with v (n + 1)2for n 22, and some of the cases for smaller n. In this article, using the structuredapproach we presented in our earlier article [8], we complete this characterization for smalln. 相似文献
10.
H. Kita 《Mathematische Nachrichten》1997,183(1):135-155
Let Φ(t) and Ψ(t) be the functions having the following representations Φ(t) = ∫a(s)ds and Ψ(t) = ∫b(s) ds, where a(s) is a positive continuous function such that ∫a(s)/s ds = + ∞ and b(s) is an increasing function such that lims→ ∞ b(s) = + ∞. Then the following statements for the Hardy - Littlewood maximal function M f (x) are equivalent:
- 1 (i) there exist positive constants c1 and s0 such that
- 1 (ii) there exist positive constant c2 and c3 such that
11.
在赋范线性空间中考察下列几类泛函方程( ) f(x) g(y) =h(x+y) , ( ) f(x+y) =f(x) f(y) , ( ) f(x+y) =f(x) +f(y) +ag(x) g(y)的性质与解以及彼此之间的关系 . 相似文献
12.
We construct a nondegenerate near polygon from a partial linear space without isolated points. We also prove that the points of a near polygon at distance at most 2 from a fixed point induce a near polygon, which is related to the class of the near polygons obtained from the construction. We give also a characterization of the near polygons of Hamming type in terms of parallelism. 相似文献
13.
§1. Definitions,LemmasandTheoremDefinition1[1] Let(X,y·y)bearealnormedlinearspaceofdemensiongreaterthan1,wedefineanglesAm,n(x,y)betweennonzerovectorsxandyinXbyAm,n(x,y)=cos-1nyxyxy+yyyyy2-myxyxy-yyyyy2+2(m-n)2(m+n),heremandnaretwonon-negentiveinte-ge… 相似文献
14.
15.
We present a sufficient condition for the surjectivity of a linear differential operator of infinite order with constant coefficients in a weighted space of infinitely differentiable functions on the real line. 相似文献
16.
为了在Banach空间X的对偶空间上刻画线性斜演化半流的一致指数稳定性,借助泛函分析与算子理论得到了其一致指数稳定的一些H?lder型充要条件,所得结果推广了稳定性理论中的一些已有结论. 相似文献
17.
X.Q. Yang 《Journal of Optimization Theory and Applications》2003,116(2):437-452
Gap functions play a crucial role in transforming a variational inequality problem into an optimization problem. Then, methods solving an optimization problem can be exploited for finding a solution of a variational inequality problem. It is known that the so-called prevariational inequality is closely related to some generalized convex functions, such as linear fractional functions. In this paper, gap functions for several kinds of prevariational inequalities are investigated. More specifically, prevariational inequalities, extended prevariational inequalities, and extended weak vector prevariational inequalities are considered. Furthermore, a class of gap functions for inequality constrained prevariational inequalities is investigated via a nonlinear Lagrangian. 相似文献
18.
19.
For linear differential operators with coefficients of class C on n, we prove theorems on the simultaneous invertibility and equivalence of spectra in the Lebesgue space L
p, Stepanov space M
p, and in a particular Banach space V
p L
p, p 1 相似文献
20.
In the Hardy space H
p, (p1, 0< 1, H
p,1 H
p) we develop best linear approximation methods (previously studied by Taikov and Ainulloev) for the classes W(r,,) of analytic functions on the unit disk and calculate the exact values of linear, Gelfand, and informational n-widths of these classes. 相似文献