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超空间2^X的连通性及其相关性质
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作者 张美丽 许品刚 邓波 《大学数学》 2011年第2期104-106,共3页
研究了赋予Vietoris拓扑的超空间2X的连通性及其相关性质.这改进了Micheal[1]的一个定理的结论.
关键词 连通性 局部连通性 道路连通性 VIETORIS拓扑 超空间
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Second Order Nonlinear Evolution Inclusions Ⅱ: Structure of the Solution Set 被引量:2
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作者 Nikolaos S. PAPAGEORGIOU Nikolaos YANNAKAKIS 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2006年第1期195-206,共12页
We contimle the work initiated in [1] (Second order nonlinear evolution inclusions I: Existence and relaxation results. Acta Mathematics Science, English Series, 21(5), 977-996 (2005)) and study the structural ... We contimle the work initiated in [1] (Second order nonlinear evolution inclusions I: Existence and relaxation results. Acta Mathematics Science, English Series, 21(5), 977-996 (2005)) and study the structural properties of the solution set of second order evolution inclusions which are defined in the analytic framework of the evolution triple. For the convex problem we show that the solution set is compact Rs, while for the nonconvex problem we show that it is path connected, Also we show that the solution set is closed only if the multivalued nonlinearity is convex valued. Finally we illustrate the results by considering a nonlinear hyperbolic problem with discontinuities. 展开更多
关键词 Evolution triple Compact embedding Second order evolution Compact Rs pathconnected CONNECTED CONTINUUM Hyperbolic problem
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Connectivity of wavelets
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作者 Dengfeng LI 《Frontiers of Mathematics in China》 CSCD 2023年第2期95-104,共10页
In this paper,path-connectivity of the set of some special wavelets in L^(2)(R),which is the topological geometric property of wavelets,is introduced.In particular,the main progress of wavelet connectivity in the past... In this paper,path-connectivity of the set of some special wavelets in L^(2)(R),which is the topological geometric property of wavelets,is introduced.In particular,the main progress of wavelet connectivity in the past twenty years is reviewed and some unsolved problems are listed.The corresponding results of high dimension case and other cases are also briefly explained. 展开更多
关键词 WAVELET MRA wavelet S-elementary wavelet frame wavelet pathconnectivity
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