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检索条件"主题词=collapsing with bounded sectional curvature"
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A generalized π2-diffeomorphism finiteness theorem
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Frontiers of Mathematics in China 2020年 第2期15卷 399-418页
作者: Xiaochun RONG Xuchao YAO Department of Mathematics Rutgers UniversityNew BrunswickNJ 08903 USA School of Mathematical Sciences Capital Normal UniversityBeijing 100048China
Theπ2-diffeomorphism finiteness result of *** and ***(independently)asserts that the diffeomorphic types of compact n-manifolds M with vanishing first and second homotopy groups can be bounded above in terms of n,and... 详细信息
来源: 维普期刊数据库 维普期刊数据库 评论
Bounding Topology via Geometry,A-Simple Fundamental Groups
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Communications in Mathematical Research 2020年 第4期36卷 489-505页
作者: Xiaochun Rong Xuchao Yao Mathematics Department Rutgers University New BrunswickNJ 08903USA. Institute ofMathematics Chinese Academy of SciencesBeijingP.R.China.
We call a group A-simple,if it has no non-trivial normal abelian *** will present finiteness results in controlled topology via geometry on manifolds whose fundamental groups are A-simple.
来源: 维普期刊数据库 维普期刊数据库 同方期刊数据库 同方期刊数据库 评论