黄文
博士 教授
中国科学技术大学 数学系
遍历理论以及拓扑动力系统的研究
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- 姓名:黄文
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:博士
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:高级-教授
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学科领域:
数理逻辑与数学基础
- 研究兴趣:遍历理论以及拓扑动力系统的研究
黄文,1975年10月生,1998年毕业于中国科学技术大学数学系,随后在科大数学系从事硕士和博士学位的学习,2003年7月获得博士学位。博士论文名称:动力系统的复杂性与点串,获2003年度中国科学院院长奖优秀奖和首届中国科学院优秀博士论文。 2001年6月开始在中国科学技术大学数学系留校工作,2004年1月被破格晋升为副教授。2004年获得中国科学技术大学杰青后备基金,2005年入选教育部新世纪优秀人才支持计划。一直从事遍历理论以及拓扑动力系统的研究。目前在混沌理论、熵理论以及传递系统分类方面得到了一些较为深刻的结论。已在国内外重要期刊上发表论文9篇,正式接受4篇,其中12篇被SCI收录。这些论文已经被他引35次, 文章的引用者包括美国艺术科学院院士B. Weiss, 《遍历论与动力系统》编委B. Host和法国马赛数学研究所前所长F. Blanchard等人。
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828
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10
【期刊论文】Devaney's chaos or 2-scattering implies Li-Yorke's chaos
黄文, Wen Huang, Xiangdong Ye *
Topology and its Applications 117(2002)259-272,-0001,():
-1年11月30日
Let X be a compact metric space, and let f: X→X be transitive with X infinite. We show that each asymptotic class (or the stable set Ws (x) for each x ∈ X) is of first category and so is th asymptotic relation. Moreover, we prove that if the proximal relation is dense in a neighbourhood of some point in the diagonal then f is chaotic in the sense of Li-Yorke. As applications we obtain that if f contains a periodic point, or f is 2-scattering, then f is chaotic in the sense of Li-Yorke. Thus, chaos in the sense of Devaney is stronger than that of Li-Yorke. Elsevier Science B.V. All rights reserved.
Devaney', s chaos, Li-Yorke', s chaos, Proximal and asymptotic relation, Scrambled set, Scattering
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【期刊论文】Homeomorphisms with the whole compacta being scrambled sets and
黄文, WEN HUANG and XIANGDONG YE
Ergod. Th. & Dynam. Sys. (2001), 21, 77-91,-0001,():
-1年11月30日
A homeomorphism on a metric space (X; d) is completely scrambled if for each x ≠ y ∈ X, lim supn sup→+∞d (fn (x), fn (y)) > 0 and lim infn→+∞C1 d (fn (x), fn (y)) = 0. We study the basic properties of completely scrambled homeomorphisms on compacta and show that there are 'many' compacta admitting completely scrambled homeomorphisms, which include some countable compacta (we give a characterization), the Cantor set and continua of arbitrary dimension.
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【期刊论文】SEQUENCE ENTROPY PAIRS AND COMPLEXITY PAIRS FOR A MEASURE
黄文, WEN HUANG and XIANGDONG YE
Ergod. Th. & Dynam. Sys. (2004), 24, 825-846,-0001,():
-1年11月30日
Blanchard et al (Topological complexity. Ergod. Th. & Dynam. Sys. 20 (2000), 641-662), the authors introduced the notion of scattering and a weaker notion of 2-scattering. It is an open question whether the two notions are equivalent. The question is answered affirmatively in this paper. Using the complexity function of an open cover along some sequences of natural numbers, we characterize mild mixing, strong scattering and scattering. We show that mildly mixing (respectively strongly mixing) systems are disjoint from minimal uniformly rigid (respectively minimal rigid) systems.
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【期刊论文】Null systems and sequence entropy pairs
黄文, W. HUANG, S. M. LI, S. SHAO and X. D. YE
Ergod. Th. & Dynam. Sys. (2003), 23, 1505-1523,-0001,():
-1年11月30日
measure-preserving transformation (respectively a topological system) is null if the metric (respectively topological) sequence entropy is zero for any sequence. Kushnirenko has shown that an ergodic measure-preserving transformation has a discrete spectrum if and only if it is null. We prove that for a minimal system this statement remains true modulo an almost one-to-one extension. It allows us to show that a scattering system is disjoint from any null minimal system. Moreover, some necessary conditions for a transitive non-minimal system to be null are obtained.
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【期刊论文】DYNAMICAL SYSTEMS DISJOINT FROM ANY MINIMAL SYSTEM
黄文, WEN HUANG AND XIANGDONG YE
AMERICAN MATHEMATICAL SOCIETY Volume 357, Number 2, Pages 669-694,-0001,():
-1年11月30日
Furstenberg showed that if two topological systems (X; T) and (Y; S) are disjoint, then one of them, say (Y; S), is minimal. When (Y; S) is nontrivial, we prove that (X; T) must have dense recurrent points, and there are countably many maximal transitive subsystems of (X; T) such that their union is dense and each of them is disjoint from (Y; S). Showing that a weakly mixing system with dense periodic points is in M, the collection of all systems disjoint from any minimal system, Furstenberg asked the question to characterize the systems in M. We show that a weakly mixing system with dense regular minimal points is in M, and each system in M has dense minimal points and it is weakly mixing if it is transitive. Transitive systems in M and having no periodic points are constructed. Moreover, we show thatthere is a distal system in M.
and phrases., Disjoint,, weakly disjoint,, minimal,, scattering,, weakly mixing.,
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【期刊论文】Mixing and proximal cells along sequences
黄文, Wen Huang, Song Shao and Xiangdong Ye
Nonlinearity 17(2004)1245-1260,-0001,():
-1年11月30日
A dynamical system (X, T) is F-transitive if for each pair of open and non-empty subsets U and V of X, N (U,V) = {n ∈ Z+: U ∩ T−nV ≠ Ø} ∈ F-where F is a collection of subsets of Z+ that is hereditary upward. (X, T) is F-mixing if (X×X, T×T) is F-transitive. For a subset S of Z+, (x, y ∈ X×X is S-proximal if lim inf Sn →+∞ d (Tn (x), Tn (y)) = 0 and the S-proximal cell PS (x) is the set of points that are S-proximal to x ∈ X. We show that if (X, T) is F-mixing, then for each S ∈ kF (the dual family of F) and x ∈ X, PS (x) is a dense Gδ subset of X, and when (X, T) is minimal and Fis a filter the reciprocal is true. Moreover, other conditions under which the reciprocal is true are obtained. Finally the structure of proximal cells for F-mixing systems is discussed, and a newand simpler proof of the Xiong-Yang theorem is presented.
37B05, 37B20, 54H20
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【期刊论文】SEQUENCE ENTROPY PAIRS AND COMPLEXITY PAIRS FOR A MEASURE
黄文, by Wen HUANG, Alejandro MAASS (*) and Xiangdong YE
Ann. Inst. Fourier, Grenoble 54, 4 (2004), 1005-1028,-0001,():
-1年11月30日
Entropy-Sequence entropy-Kronecker factor.,
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【期刊论文】An explicit scattering, non-weakly mixing example and weak disjointness
黄文, Wen Huang and Xiangdong Ye
Nonlinearity 15(2002)849-862,-0001,():
-1年11月30日
By a dynamical system we mean a pair (X, T), where X is a compact metric space and T: X→X is surjective and continuous. We study weak disjointness in topological dynamics. (X, T) is scattering iff it is weakly disjoint from all minimal systems and (X, T) is strongly scattering iff it is weakly disjoint from all E-systems, i.e. transitive systems having invariant measures with full support. It is clear that a weakly mixing system is strongly scattering and the latter is scattering. An existential proof of scattering and a non-weakly mixing example is obtained by Akin and Glasner (2001 J. Anal. Math. 84 243-86). In this paper, we will give an explicit example which is strongly scattering and not weakly mixing. We also define extreme scattering, weak scattering and study the relationships of the various definitions.By a dynamical system we mean a pair (X, T), where X is a compact metric space and T: X → X is surjective and continuous. We study weak disjointness in topological dynamics. (X, T) is scattering iff it is weakly disjoint from all minimal systems and (X, T) is strongly scattering iff it is weakly disjoint from all E-systems, i.e. transitive systems having invariant measures with full support. It is clear that a weakly mixing system is strongly scattering and the latter is scattering. An existential proof of scattering and a non-weakly mixing example is obtained by Akin and Glasner (2001 J. Anal. Math. 84 243-86). In this paper, we will give an explicit example which is strongly scattering and not weakly mixing. We also define extreme scattering, weak scattering and study the relationships of the various definitions.
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【期刊论文】A LOCAL VARIATIONAL RELATION AND APPLICATIONS
黄文, Wen Huang and Xiangdong Ye
,-0001,():
-1年11月30日
In [BGH] the author show that for a given topological system (X; T) and an open cover U there is an invariant measuresuch that inf h (T; P), htop (T; U), where infimum is taken over all partitions which are finer than U. We prove in this paper that if is an invariant measure and inf h
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【期刊论文】Entropy pairs and a local Abramov formula for a measure theoretical entropy of open covers
黄文, W. HUANG, A. MAASS, P. P. ROMAGNOLI and X. YE
Ergod. Th. & Dynam. Sys. (2004), 24, 1127-1153,-0001,():
-1年11月30日
(X, T) be a topological dynamical system and let µ be a T-invariant probability measure on X. In this paper, we study two properties of the notions of measure theoretical entropy for a measurable cover U, h+µ (U, T) and h−µ (U, T) introduced by P. P. Romagnoli (Ergod. Th. & Dynam. Sys. 23 (2003), 1601-1610). The main result of the paper states that entropy pairs for the measure µ can be defined using either h+µ or h−µ. We also prove that both h+µ and h−µ have an ergodic decomposition and we use it to provea local Abramov formula for h−µ.
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