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国家自然科学基金(10601053): 作品数：2被引量：0H指数：0; 导出分析报告; 相关作者：严亚军陈卿更多>>; 相关机构：中国科学技术大学更多>>; 相关期刊：《中国科学技术大学学报》《Chinese Annals of Mathematics,Series B》更多>>; 相关主题：GAUSS曲率DEGREECOMPACTCOHOMOLOGYSYMMETRY更多>>; 相关领域：理学更多>>

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Gauss曲率具下界的Ricci流(英文): 《中国科学技术大学学报》2011年第5期377-383,共7页陈卿严亚军; Supported by National Natural Science Foundation of China(10601053); 证明了一个2维流形上,如果初始Riemann度量的Gauss曲率有下界,则不论度量是否完备,它的Ricci流存在。; 关键词：Riemann度量 GAUSS曲率 RICCI流

The Degree of Symmetry of Certain Compact Smooth Manifolds II: 《Chinese Annals of Mathematics,Series B》2007年第2期195-204,共10页Bin XU Department of Mathematics, University of Science and Technology of China, Hefei 230026, China Chern Institute of Mathematics, Nankai University, Tianjin 300071, China Department of Mathematics, Johns Hopkins University, Baltimore, MD 21218, USA.; Project supported by the Japanese Government Scholarship;the Japan Society for the Promotion of Science Postdoctoral Fellowship for Foreign Researchers;the Focused Research Group Postdoctoral Fellowship;the Program of Visiting Scholars at Chern Institute of Mathematics;the National Natural Science Foundation of China (No. 10601053).; We give the sharp estimates for the degree of symmetry and the semi-simple degree of symmetry of certain compact fiber bundles with non-trivial four dimensional fibers in the sense of cobordism, by virtue of the rigid...; 关键词：Degree of symmetry Fiber bundle COBORDISM Non-positive Curvature Harmonic map First cohomology

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