闵可夫斯基空间中子流形的若干性质

本文研究了Ｆｉｎｓｌｅｒ流形中的子流形,特别地,我们给出了闵可夫斯基空间中超球面的一个特征,同时,我们讨论了闵可夫斯基空间中超曲面的第二基本形式。     

非光滑三次代数曲面簇上Kahler-EinsteinOrbifold度量的一个存在性定理

本文利用Ｋａｈｌｅｒ－Ｅｉｎｓｔｅｉｎ流形的模空间思想，证明了非光滑三次代数曲面簇上Ｋａｈｌｅｒ－Ｅｉｎｓｔｅｉｎｏｒｂｉｆｏｌｄ度量的一个存在性定理。     

E^n空间中Finsler—Hadwiger不等式的k维对偶式

本文首先给出一个代数不等式,其次利用它获得了ｎ维欧氏空间Ｅ＾ｎ中联系任意ｍ个单形的ｋ维与ｎ维体积的一个几何不等式,作为其特殊情况得到了Ｆｉｎｓｌｅｒ－Ｈａｄｗｉｇｅｒ不等式在Ｅ＾ｎ中的Ｋ维对偶式。     

关于复超曲面上具正数量曲率之Riemann度量的存在性

本文用作者的Ｒｏｋｈｌｉｎ同余公式来计算旋复超曲面的α－不变量．将此结果与Ｌａｗｓｏｎ－Ｍｉｃｈｅｌｓｈｏｎ及Ｈｉｒｚｅｂｒｕｃｈ以前的结果相结合并应用Ｓｔｏｌｚ的一定理，可以确定什么样的旋复超曲面上具有数量曲率为正的Ｒｉｅｍａｎｎ度量．     

铁磁链型的LANDAU-LIFSHITZ方程

本文研究Ｒｉｅｍａｎｎ曲面上的带有Ｇｉｌｂｅｒｔ阻尼项的铁磁链型方程．设Ｍ和Ｆ是两个闭Ｒｉｅｍａｎｎ曲面，那么对任一初值ｕ０∈Ｈ１，２（Ｍ；Ｆ），利用热方法及先验估计证明了在Ｍ×（０，∞）上存在唯一一个ＬａｎｄａｕＬｉｆｓｈｉｔｚ方程（１．５）的解，而且至多除了Ｍ×（０，∞）中的一个有限点集外，解是正则的．进一步，如果Ｆ的亏格不是零，解在Ｍ×（０，∞）上是正则的．     

黎曼曲面上Riemann边值问题的一点注记

本文给出了紧黎曼曲面上关于Ｒｉｅｍａｎｎ边值问题的Ａｂｅｌ定理，由此定理可得经典Ａｂｅｌ定理，并且解决了非紧黎曼曲面上关于Ｒｉｅｍａｎｎ边值问题的ＣｏｕｓｉｎＩ，ＩＩ问题。     

零理想边界的素端上某类椭圆型方程的非负解

考虑具有零理想边界的非紧镶边Ｒｉｅｍａｎｎ曲面Ω＝Ω∪　Ω及其上的Ｄｉｒｉｃｈｌｅｔ积分有限的非负局部Ｈｏｌｄｅｒ连续的二重共变量Ｐ．用Ｆ表示方程上Δｕ＝Ｐｕ在 Ω取极限值０的非负连续解全体．本文讨论拟Ｐｉｃａｒｄ原理成立的充要条件并证明：若Ω的每一理想边界点都有端邻域满足广义Ｈｅｉｎｓ条件,则Ｍａｒｔｉｎ函数全体所成之集是Ｆ中的极小正解全体所支撑的子半线性空间Ｐ的一个Ｈａｍｅｌ基,而且Ｆ可表示为与Ｐ相关的直和形式．     

交错纽结补中的不可压缩、两两不可压缩曲面

本文利用ｔｗｉｓｔ－ｃｒｏｓｓｉｎｇ ｎｕｍｂｅｒ讨论了交错纽结补中的不可压缩、两两不可压缩曲面的性质．设Ｋ是素的交错纽结，Ｆ?Ｓ^３－Ｋ是不可压缩、两两不可压缩曲面．如果Ｋ的ｔｗｉｓｔ－ｃｒｏｓｓｉｎｇ ｎｕｍｂｅｒ不超过５，则曲面Ｆ是ｐｕｎｃｔｕｒｅｄ ｓｐｈｅｒｅ．     

关于Minkowski空间的子流形

利用Ｆｉｎｓｌｅｒ法曲率Ａ、Ｌａｎｄｓｂｅｒｇ曲率Ｌｙ、法切曲率Ｆｙ、Ｂｅｒｗａｌｄ联络Ｄ以及第二基本形式Ⅱ_ｙ，研究Ｍｉｎｋｏｗｓｋｉ空间中的子流形、子流形的旗曲率与李齐曲率．     

The Einstein－K ah ler Metrics with Singularitieson A Class of the Reinhardt Domains

ＴｈｅＥｉｎｓｔｅｉｎ－Ｋ ａｈ ｌｅｒ　ＭｅｔｒｉｃｓｗｉｔｈＳｉｎｇｕｌａｒｉｔｉｅｓｏｎＡＣｌａｓｓｏｆｔｈｅＲｅｉｎｈａｒｄｔＤｏｍａｉｎｓ　ＹｉｎＷｅｉｐｉｎｇ（殷慰萍）；ＷａｎｇＡｎ（王安）（Ｄｅｐｔ．ｏｆＭａｔｈ．ＣａｐｉｔａｌＮｏｒｍａ...     

Eigenvalue control for a Finsler–Laplace operator

Using the definition of a Finsler–Laplacian given by the first author, we show that two bi-Lipschitz Finsler metrics have a controlled spectrum. We deduce from that several generalizations of Riemannian results. In particular, we show that the spectrum on Finsler surfaces is controlled above by a constant depending on the topology of the surface and on the quasireversibility constant of the metric. In contrast to Riemannian geometry, we then give examples of highly non-reversible metrics on surfaces with arbitrarily large first eigenvalue.     

Projectively flat Finsler 2-spheres of constant curvature

After recalling the structure equations of Finsler structures on surfaces, I define a notion of "generalized Finsler structure" as a way of microlocalizing the problem of describing Finsler structures subject to curvature conditions. I then recall the basic notions of path geometry on a surface and define a notion of "generalized path geometry" analogous to that of "generalized Finsler structure". I use these ideas to study the geometry of Finsler structures on the 2-sphere that have constant Finsler-Gauss curvature K and whose geodesic path geometry is projectively flat, i.e., locally equivalent to that of straight lines in the plane. I show that, modulo diffeomorphism, there is a 2-parameter family of projectively flat Finsler structures on the sphere whose Finsler-Gauss curvature K is identically 1.     

Bochner-Kodaira Techniques on K¨ahler Finsler Manifolds

A horizontal Hodge Laplacian operator $\square_{\mathcal {H}}$ is defined for Hermitian holomorphic vector bundles over PTM on K¨ahler Finsler manifold, and the expression of $\square_{\mathcal {H}}$ is obtained explicitly in terms of horizontal covariant derivatives of the Chern-Finsler connection. The vanishing theorem is obtained by using the $\partial_{\mathcal {H}}\ov{\partial}_{\mathcal {H}}$-method on K¨ahler Finsler manifolds.     

The holonomy group of locally projectively flat Randers two-manifolds of constant curvature

In this paper, we investigate the holonomy structure of the most accessible and demonstrative 2-dimensional Finsler surfaces, the Randers surfaces. Randers metrics can be considered as the solutions of the Zermelo navigation problem. We give the classification of the holonomy groups of locally projectively flat Randers two-manifolds of constant curvature. In particular, we prove that the holonomy group of a simply connected non-Riemannian projectively flat Finsler two-manifold of constant non-zero flag curvature is maximal and isomorphic to the orientation preserving diffeomorphism group of the circle.     

Plateau’s problem in Finsler 3-space

We explore a connection between the Finslerian area functional based on the Busemann–Hausdorff-volume form, and well-investigated Cartan functionals to solve Plateau’s problem in Finsler 3-space, and prove higher regularity of solutions. Free and semi-free geometric boundary value problems, as well as the Douglas problem in Finsler space can be dealt with in the same way. We also provide a simple isoperimetric inequality for minimal surfaces in Finsler spaces.     

Finsler空间上的Weyl曲率

The Weyl curvature of a Finsler metric is investigated. This curvature constructed from Riemannain curvature. It is an important projective invariant of Finsler metrics. The author gives the necessary conditions on Weyl curvature for a Finsler metric to be Randers metric and presents examples of Randers metrics with non-scalar curvature. A global rigidity theorem for compact Finsler manifolds satisfying such conditions is proved. It is showed that for such a Finsler manifold,if Ricci scalar is negative,then Finsler metric is of Randers type.     

On a class of Riemann surfaces

It is considered the class of Riemann surfaces with dimT1 = 0, where T1 is a subclass of exact harmonic forms which is one of the factors in the orthogonal decomposition of the spaceΩH of harmonic forms of the surface, namely The surfaces in the class OHD and the class of planar surfaces satisfy dimT1 = 0. A.Pfluger posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimT1 = 0 among the surfaces of the form Sg\K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.     

Finsler空间中的Laplace算子及其性质

在Finsler空间中给出了一种非线性的Laplace算子Δ,得到了Laplace算子Δ满足的性质,同时指出了Δ与Riemann空间中Laplace算子的异同.     

HORIZONTAL LAPLACE OPERATOR IN REAL FINSLER VECTOR BUNDLES

A vector bundle F over the tangent bundle TM of a manifold M is said to be a Finsler vector bundle if it is isomorphic to the pull-back π^＊E of a vector bundle E over M（[1]）. In this article the authors study the h-Laplace operator in Finsler vector bundles. An h-Laplace operator is defined, first for functions and then for horizontal Finsler forms on E. Using the h-Laplace operator, the authors define the h-harmonic function and ho harmonic horizontal Finsler vector fields, and furthermore prove some integral formulas for the h-Laplace operator, horizontal Finsler vector fields, and scalar fields on E.     

Minimality of totally geodesic submanifolds in Finsler geometry

Using the symplectic definition of the Holmes-Thompson volume we prove that totally geodesic submanifolds of a Finsler manifold are minimal for this volume. Thanks to well suited technics the minimality of totally geodesic hypersurfaces (see álvarez Paiva and Berck in Adv Math 204(2):647–663, 2006) and 2-dimensional totally geodesic surfaces (see álvarez Paiva and Berck in Adv Math 204(2):647–663, 2006, Ivanov in Algebra i Analiz 13(1)26–38, 2001) had already been proved. However the corresponding statement for the Hausdorff measure is known to be wrong even in the simplest case of totally geodesic 2-dimensional surfaces in a 3-dimensional Finsler manifold (see álvarez Paiva and Berck in Adv Math 204(2):647–663, 2006).