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HARMONIC MAPS AND FUNDAMENTAL GROUPS OF NONPOSITIVELY CURVEDRIEMANNIAN MANIFOLDS
作者姓名:Shen Chunli  Zhou Qing
作者单位:SHEN CHUNLI * ZHOU QING * Department of Mathematics,East China Normal University,Shanghai 200062,China.
基金项目:ProjectsupportedbytheNationalNaturalScienceFoundationofChina ,FEYUTofChinaandHYTEF
摘    要:Thetheoryofharmonicmapsintoacompactnonpositivelycurvedtargetiswell-developed.TheexistenceofsuchaharmonicmappinginanygivenhomotopyclassisestablishedbyEellsandSampson1]in1964,andlater,in1967,Hartman2]gaveaproofoftheuniqueness.Thispaperisdevotedtoanapplicationo…

关 键 词:调和映射  基本群  黎曼流形  非正曲线
收稿时间:1994/1/17 0:00:00
修稿时间:1995/4/13 0:00:00

HARMONIC MAPS AND FUNDAMENTAL GROUPS OF NONPOSITIVELY CURVED RIEMANNIAN MANIFOLDS
Shen Chunli,Zhou Qing.HARMONIC MAPS AND FUNDAMENTAL GROUPS OF NONPOSITIVELY CURVEDRIEMANNIAN MANIFOLDS[J].Chinese Annals of Mathematics,Series B,1996,17(4):491-496.
Authors:Shen Chunli and Zhou Qing
Institution:DepartmentofMathematics,EastChinaNormalUniversity,Shanghai200062,China
Abstract:Using the theory of harmonic maps the authors discuss theproperties of the fundamental group of a complete nonpositivelycurved Riemannian manifold, and prove that the finitely generatedvirtual solvable subgroup of fundamental group of a completenonpositively curved Riemannian manifold either is a peripheralsubgroup of fundamental group or can be realized by animmersed totall geodesic closed flat manifold. It generalizessome results of Gromoll-Wolf, Lawson-Yan and Schoen-Yau.
Keywords:Harmonic map  Riemannian manifold  Fundamental  group
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