共查询到20条相似文献,搜索用时 328 毫秒
1.
本文给出一类带由边界的调和映射的Liouville型定理,这种类型的定理在微分几何的一些问题中有十分重要的应用.我们通过对调和映射的能量选取特殊的变分族,得到任意从半空间的简单流形到一黎曼流形的带自由边界的调和映射在如果满足适当的条件(见定理)必为常值映射的结果. 相似文献
2.
莫小欢 《数学年刊A辑(中文版)》1994,(1)
设φ是从Riemann面M到复Grassmann流形Gk,n的调和映射.本文证得φ的Gauss丛之间的基本关系式.利用它和约化定理,证明了若干构造定理和调和序列的基本不等式,推广了Wood,Ramanathan,Udagawa,Burstall及Wolfson的相应结果.通过把迷向调和映射的Gauss丛作正交和,给出了从2维拓扑球到Gk,n(2≤k<n)的具有一切迷向阶的调和映射的例子,它们的曲率和Kahler角均为常值. 相似文献
3.
4.
5.
与星象函数有关的拟共形近于凸调和映射 总被引:1,自引:0,他引:1
讨论了一类解析部分为星象函数的拟共形近于凸调和映射的基本性质,得到了此类映射的系数不等式、积分表达式、增长定理、面积定理与部分和的近于凸半径. 相似文献
6.
7.
单值映射对与集值映射对的公共不动点 总被引:1,自引:0,他引:1
在度量空间中,引进了单值映射对与集值映射对的调和概念,对调和单值映射对与集值映射对建立了公共不动点定理及相应的随机公共不动点定理。 相似文献
8.
本文证明了下列定理:设{fn:D→D}是单位圆D到自身的、关于Poincaré度量的K拟共形调和映射序列,则序列{fn}中有一个在闭单位圆D上一致收敛的子序列,其极限函数也是Poincaré圆上的调和映射. 相似文献
9.
本文研究了一类局部单叶对数调和映射的若干性质.利用复分析的方法与技巧,获得了该类映射的增长定理和两种新的Bohr半径,推广了几何函数的理论研究结果. 相似文献
10.
11.
Bayram Sahin 《Proceedings Mathematical Sciences》2008,118(4):573-581
We study harmonic Riemannian maps on locally conformal Kaehler manifolds (lcK manifolds). We show that if a Riemannian holomorphic
map between lcK manifolds is harmonic, then the Lee vector field of the domain belongs to the kernel of the Riemannian map
under a condition. When the domain is Kaehler, we prove that a Riemannian holomorphic map is harmonic if and only if the lcK
manifold is Kaehler. Then we find similar results for Riemannian maps between lcK manifolds and Sasakian manifolds. Finally,
we check the constancy of some maps between almost complex (or almost contact) manifolds and almost product manifolds. 相似文献
12.
构造了p 调和发展方程的初边值问题的一个整体弱解;证明了当初值u0(x)是弱p 调和映射但不是弱p 驻调和映射时问题弱解的不唯一性. 相似文献
13.
本文利用复射影空间到欧氏空间的第一标准嵌入,对于复射影空间的子流形建立了一种广义的Gauss映照,并给出了这种广义的Gau8s映照是调和映照和相对仿射映照的条件。 相似文献
14.
本文研究球空间中子流形的共形高斯映射,用Moebius不变量刻划了该映射 为调和映射的条件.作为特例,指出球空间的2维子流形的共形高斯映射是调和映射 当且仅当该子流形是Willmore子流形. 相似文献
15.
In this paper,we consider the existence of harmonic maps from a Finsler manifold and study the characterisation of harmonic maps,in the spirit of Ishihara.Using heat quation method we show that any map from a compact Finsler manifold M to a compact Riemannian manifold with non-positive sectional curvature can be deformed into a harmonic map which has minimum energy in its homotopy class. 相似文献
16.
De Liang HSU Jia Yu LI 《数学学报(英文版)》2008,24(2):223-226
We prove a compactness theorem for k-indexed stationary harmonic maps, and show a regularity theorem for this kind of maps which says that the singular set of a k-indexed stationary harmonic map is of Hausdorff dimension at most m-3. 相似文献
17.
MO Xiaohuan~ YANG Yunyan~.LMAM School of Mathematical Sciences Peking University Beijing China.Department of Mathematics Renmin University of China Beijing China 《中国科学A辑(英文版)》2005,48(1):115-130
In this paper,we consider the existence of harmonic maps from a Finsler man-ifold and study the characterisation of harmonic maps,in the spirit of lshihara.Using heatequation method we show that any map from a compact Finsler manifold M to a com-pact Riemannian manifold with non-positive sectional curvature can be deformed into aharmonic map which has minimum energy in its homotopy class. 相似文献
18.
In this paper we study surfaces in S4 and their twistor Gauss maps. Some necessary and sufficient conditions that the twistor Gauss map is harmonic are given. We find many examples of nonisotropic harmonic maps from a surface to P
3.Supported by the National Natural Science Foundation of China and the Science Foundation of Zhejiang Province. 相似文献
19.
CHEN Qun 《数学年刊B辑(英文版)》1999,20(2):247-254
51.IntroductionLetMbeanm-dimensionalcompletenoncompactRiemannianmanifold,pEM.P.LiandL.F.Turnintroducedin[8]avolumecomparisoncondition(VC)(seethedefinitionbelow).TheyobtainedsomeimportantanalyticpropertiesifMsatisfies(VC)andtheRiccicurvatureconditionRice(x)2--(m--1)K/(1 r(x))',wherer(x)isthedistancefromptox,K20isaconstant.ItisinterestingtoknowmoreabouttheanalysisonsuchamanifoldM.LetNbeacompleteRiemannianmanifoldwiththesectionalcurvatureKNboundedabovebysomeconstantK20.B.(T)denotestheg… 相似文献
20.