共查询到20条相似文献,搜索用时 15 毫秒
1.
We obta(?) gener(?)ization of a fixed point th(?)of Dotson for nan-expansive mapptngs on star-sba p(?)sets and then(?)it to Prooe a unified Brosowski-M(?)us theorem on in(?)ariant approximatton in the setting,(?)fp-normed line(?)spaces. 相似文献
2.
Mei Feng Dai 《数学学报(英文版)》2008,24(8):1313-1318
We pursue the study on homogeneous Cantor sets with their translations. We get the fractal structure of intersection I(t), and find that the Hausdorff measure of these sets forms a discrete spectrum whose non-zero values come only from shifting numbers with the coding of t. Concretely, a very brief calculation formula of the measure with the coding of t is given. 相似文献
3.
The purpose of this paper is to introduce and discuss the concept of topical functions on upward sets.We give characterizations of topical functions in terms of upward sets. 相似文献
4.
Yun Hu 《数学学报(英文版)》2009,25(8):1289-1296
We study the fixed point sets of subgroups of modular groups acting on Teichmiiller spaces. 相似文献
5.
We apply the imperfect bifurcation theory in Banach spaces to study the exact multiplicity of solutions to a perturbed logistic type equations on a symmetric spatial domain. We obtain the precise bifurcation diagrams. 相似文献
6.
Martha GUZMáN-PARTIDA 《Frontiers of Mathematics in China》2013,8(6):1265-1274
We discuss continuity of the Poisson transform on Herz spaces Bp as well as its action on weighted versions of these sets. We also consider Banach- valued versions of Herz spaces and study some of their properties. 相似文献
7.
In this paper,we study the bases and base sets of primitive symmetric loop-free (generalized)signed digraphs on n vertices.We obtain sharp upper bounds of the bases,and show that the base sets of the classes of such digraphs are{2,3,...,2n-1}.We also give a new proof of an important result obtained by Cheng and Liu. 相似文献
8.
陈振龙 《数学物理学报(B辑英文版)》2011,31(3):969-992
This paper studies fractal properties of polar sets for random string processes. We give upper and lower bounds of the hitting probabilities on compact sets and prove some sufficient conditions and necessary conditions for compact sets to be polar for the random string process. Moreover, we also determine the smallest Hausdorff dimensions of non-polar sets by constructing a Cantor-type set to connect its Hausdorff dimension and capacity. 相似文献
9.
The original Erds-Ko-Rado problem has inspired much research. It started as a study on sets of pairwise intersecting k-subsets in an n-set, then it gave rise to research on sets of pairwise non-trivially intersecting k-dimensional vector spaces in the vector space V (n, q) of dimension n over the finite field of order q, and then research on sets of pairwise non-trivially intersecting generators and planes in finite classical polar spaces. We summarize the main results on the Erds-Ko-Rado problem in these three settings, mention the Erds-Ko-Rado problem in other related settings, and mention open problems for future research. 相似文献
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12.
《分析论及其应用》2002,(3)
We present explicit estimates for the growth of sine-type-functions as well as for the derivatives at their zero sets, thus obtaining explicit constants in a result of Levin. The estimates are then used to derive explicit lower bounds for exponential Riesz bases, as they arise in Avdonin's Theorem on 1/4 in the mean or in a Theorem, of Bogmer, Horvath, Job and Seip. An application is discussed, where knowledge of explicit lower bounds of exponential Riesz bases is desirable. 相似文献
13.
Klaus Potzelberger 《分析论及其应用》2003,19(4):355-364
We give a brief introduction to results on the asymptotics of quantizatlon errors. The topics discussed in-clude the quantization dimension, asymptotic distributions of sets of prototypes, asymptotically optimalquantizations, approximations and random quantizations. 相似文献
14.
Let f be an entire solution of the Tumura-Clunie type non-linear delay differential equation.We mainly investigate the dynamical properties of Julia sets of f,and the lower bound estimates of the measure of related limiting directions is verified. 相似文献
15.
G. Crombez 《分析论及其应用》1997,(4)
We present a parallel iterative algorithm to find the shortest distance projection of a given point onto the intersection of a finite number of closed convex sets in a real Hilbert space ; the number of sets used at each iteration stept corresponding to the number of available processors, may be smaller than the total number of sets. The relaxation coefficient at each iteration step is determined by a geometrical condition in an associated Hilbert space, while for the weights mild conditions are given to assure norm convergence of the resulting sequence. These mild conditions leave enough flexibility to determine the weights more specifically in order to improve the speed of convergence. 相似文献
16.
CLASSIFICATION OF GENERALIZED CARTAN MATRICES OF HYPERBOLIC TYPE 总被引:1,自引:0,他引:1
Li Wanglai 《数学年刊B辑(英文版)》1988,9(1):68-78
In this paper,the author gives all Dynkin diagrams of generalized Cartan matrices ofhyperbolic type,the order of hyperbolic generalized Carton matrix is less than or equal to10.All indefinite generalized Cartan matrices of order 2 are hyperbolic.The number ofDynkin diagrams of hyperbolic generalized Cartan matrices whose order is larger than 2 is238.Meanwhile,the author finds all Dynkin diagrams of strictly hyperbolic generalizedCartan matrices. 相似文献
17.
We are concerned with the sets of quasi generic points in finite symbolic space. We estimate the sizes of the sets by the Billingsley dimension defined by Gibbs measures. A dimension formula of such set is given, which generalizes Bowen's result. An application is given to the level sets of Birkhoff average. 相似文献
18.
AlexanderM.Lindner 《逼近论及其应用》2002,18(3):26-41
We present explicit estimates for the growth of sine-type-functions as well as for the derivatives at their zero sets,thus obtaining explicit constants in a result of Levin.The estimates are then used to derive explicit lower bounds for exponential Riesz bases,as they arise in Avdonin‘s Theorem on 1/4 in the mean or in a Theorem of Bogmer,Horvath,Joo and Seip.An application is discussed,where knowledge of explicit lower bounds of exponential Riesz bases in desirable. 相似文献
19.
C. A. Morales 《数学学报(英文版)》2015,31(9):1501-1507
We prove that the existence of positively expansive measures for continuous maps on compact metric spaces implies the existence of e 0 and a sequence of(m, e)-separated sets whose cardinalities go to infinite as m →∞. We then prove that maps exhibiting such a constant e and the positively expansive maps share some properties. 相似文献
20.
We study the existence and stability of the standing waves of two coupled Schrdinger equations with potentials |x|bi(bi ∈ R, i = 1, 2). Under suitable conditions on the growth of the nonlinear terms, we first establish the existence of standing waves of the Schrdinger system by solving a L2-normalized minimization problem, then prove that the set of all minimizers of this minimization problem is stable. Finally, we obtain the least energy solutions by the Nehari method and prove that the orbit sets of these least energy solutions are unstable, which generalizes the results of [11] where b1= b2= 2. 相似文献