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关于粗同伦(英文)
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作者 李丹 《复旦学报(自然科学版)》 CAS CSCD 北大核心 2007年第2期204-208,共5页
通过计算K同调群和K群,可以得到几何空间的拓扑几何信息.借助于同伦可以拓展可计算空间的范畴.在粗几何的领域不同的粗同伦形式已从不同角度引入,在充分例证的基础上研究了这些粗同伦并讨论了它们的区别和联系.
关键词 粗同伦 粗几何 粗形式baum-connes猜测
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Persistence Approximation Property for Maximal Roe Algebras
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作者 Qin WANG Zhen WANG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2020年第1期1-26,共26页
Persistence approximation property was introduced by Hervé Oyono-Oyono and Guoliang Yu. This property provides a geometric obstruction to Baum-Connes conjecture. In this paper, the authors mainly discuss the pers... Persistence approximation property was introduced by Hervé Oyono-Oyono and Guoliang Yu. This property provides a geometric obstruction to Baum-Connes conjecture. In this paper, the authors mainly discuss the persistence approximation property for maximal Roe algebras. They show that persistence approximation property of maximal Roe algebras follows from maximal coarse Baum-Connes conjecture. In particular, let X be a discrete metric space with bounded geometry, assume that X admits a fibred coarse embedding into Hilbert space and X is coarsely uniformly contractible, then Cmax*(X) has persistence approximation property. The authors also give an application of the quantitative K-theory to the maximal coarse Baum-Connes conjecture. 展开更多
关键词 Quantitative K-THEORY PERSISTENCE approximation property MAXIMAL coarse baum-connes conjecture MAXIMAL ROE ALGEBRAS
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Persistence Approximation Property for L^(p)Operator Algebras
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作者 Hang WANG Yanru WANG +1 位作者 Jianguo ZHANG Dapeng ZHOU 《Chinese Annals of Mathematics,Series B》 CSCD 2024年第6期869-904,共36页
In this paper,the authors study the persistence approximation property for quantitative K-theory of filtered L^(p)operator algebras.Moreover,they define quantitative assembly maps for L^(p)operator algebras when p∈[1... In this paper,the authors study the persistence approximation property for quantitative K-theory of filtered L^(p)operator algebras.Moreover,they define quantitative assembly maps for L^(p)operator algebras when p∈[1,∞).Finally,in the case of L^(p)crossed products and L^(p)Roe algebras,sufficient conditions for the persistence approximation property are found.This allows to give some applications involving the L^(p)(coarse)Baum-Connes conjecture. 展开更多
关键词 L^(p)operator algebra Quantitative assembly map Persistence approxi-mation property L^(p)baum-connes conjecture
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