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arXiv 1209.1379gr-qcmath.DG
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绝对代数几何的整体方法

A Global Approach to Absolute Parallelism Geometry

Nabil L. Youssef, Waleed A. Elsayed

摘要:

在本文中,我们提供了一个\emph{global}调查的几何平行流形(或绝对平行几何)经常使用的应用。我们从全局的角度讨论了不同的线性联络和曲率张量。我们给出了一个显著线性联络的存在唯一性定理,称为典型联络。不同的曲率张量仅用正则联络的挠率张量来表示。利用Bianchi恒等式,得到了一些有趣的恒等式.本文定义并研究了一个重要的特殊四阶张量,即Wanas张量。最后建立了绝对平行空间基本几何对象的双重视图:计算了这些几何对象在平行基上的表达式,并与自然基上相应的局部表达式进行了比较。一些几何对象考虑的物理方面指出。

英文摘要:

In this paper we provide a \emph{global} investigation of the geometry of parallelizable manifolds (or absolute parallelism geometry) frequently used for application. We discuss the different linear connections and curvature tensors from a global point of view. We give an existence and uniqueness theorem for a remarkable linear connection, called the canonical connection. Different curvature tensors are expressed in a compact form in terms of the torsion tensor of the canonical connection only. Using the Bianchi identities, some interesting identities are derived. An important special fourth order tensor, which we refer to as Wanas tensor, is globally defined and investigated. Finally a double-view for the fundamental geometric objects of an absolute parallelism space is established: The expressions of these geometric objects are computed in the parallelization basis and are compared with the corresponding local expressions in the natural basis. Physical aspects of some geometric objects considered are pointed out.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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