關(guān)于擬常曲率空間中的偽臍子流形
[Abstract]:In this paper, we mainly study compact pseudo-umbilical submanifolds with parallel mean curvature vectors in quasi-constant curvature spaces. By using the method of J.Simons to study the minimal submanifolds in constant curvature space, the Laplacian, of the square of the second basic form module length of the subfluidic is estimated. In this paper, some Pinching theorem of this kind of submanifolds with regard to the square and section curvature and Ricci curvature of the module length of the second basic form are obtained. This paper is divided into four chapters. In chapter 1, the research status of submanifolds at home and abroad is introduced, especially the submanifolds in constant curvature and quasi-constant curvature spaces. In chapter 2, the basic knowledge of Riemannian manifolds and their submanifolds is introduced. In chapter 3, we mainly introduce quasi-constant curvature Riemannian manifolds, and give the basic equations of Riemann submanifolds in quasi-constant curvature space. Chapter 4 is the central content of this paper. The compact pseudo-umbilical submanifolds with parallel mean curvature vector in quasi-constant curvature space are studied, and the related Lemma and calculation are given, and the main results and proof of this paper are obtained. The related results on constant curvature space are extended.
【學(xué)位授予單位】:西南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:O186.1
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