首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5篇
  免费   1篇
数学   6篇
  2021年   1篇
  2013年   1篇
  2012年   1篇
  2009年   1篇
  2007年   1篇
  2005年   1篇
排序方式: 共有6条查询结果,搜索用时 403 毫秒
1
1.
In this paper we prove that there is no nonconstant stable quasi-harmonic sphere from ${({\bf{R}^n}, e^{-|x|^2/2(n-2)}ds_0^2)}$ to N.  相似文献   
2.
Dirac-wave maps     
Motivated by supersymmetric field theories, we couple the nonlinear sigma model on 1 + 1-dimensional Minkowski space with a spinor field. The corresponding Lagrangian is . The classical solutions of this model are called Dirac-wave maps. We prove that there exists a unique global solution for given Cauchy data.Received: 28 May 2004, Accepted: 9 June 2004, Published online: 16 July 2004  相似文献   
3.
In this paper we review all the main known results about mean curvature flows with initial surfaces symplectic in a Kähler-Einstein surface, including published results and new results obtained recently. We also propose some problems that we think are very interesting.  相似文献   
4.
In this paper, we study the singularities of the mean curvature flow from a symplectic surface or from a Lagrangian surface in a Käahler-Einstein surface. We prove that the blow-up flow Σ s at a singular point (X 0, T 0) of a symplectic mean curvature flow Σ t or of a Lagrangian mean curvature flow Σ t is a nontrivial minimal surface in ?4, if Σ ?∞ is connected.  相似文献   
5.
In this paper,we start to study the gradient flow of the functional Lβ introduced by Han-Li-Sun in[8].As a first step,we show that if the initial surface is symplectic in a K?hler surface,then the symplectic property is preserved along the gradient flow.Then we show that the singularity of the flow is characterized by the maximal norm of the second fundamental form.When β=1,we derive a monotonicity formula for the flow.As applications,we show that the l-tangent cone of the flow consists of the finite flat planes.  相似文献   
6.
Let Σ be an immersed symplectic surface in CP 2 with constant holomorphic sectional curvature k > 0. Suppose Σ evolves along the mean curvature flow in CP 2. In this paper, we show that the symplectic mean curvature flow exists for long time and converges to a holomorphic curve if the initial surface satisfies ${|A|^2 \leq \lambda|H|^2 + \frac{2\lambda-1}{\lambda}k}$ and ${\cos\alpha\geq\sqrt{\frac{7\lambda-3}{3\lambda}}\left(\frac{1}{2} < \lambda\leq\frac{2}{3}\right) {\rm or} |A|^2\leq \frac{2}{3}|H|^2+\frac{4}{5}k\cos\alpha\, {\rm and} \cos\alpha\geq 1-\varepsilon}$ , for some ${\varepsilon}$ .  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号