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arXiv 1405.0645math-phmath.MP
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伪Finsler空间的联络

The connections of pseudo-Finsler spaces

E. Minguzzi

摘要:

介绍了(伪)Finsler几何及其联系.对于大多数结果,我们提供简短和自包含的证明。我们对Berwald非线性联络的研究是在Mangiarotti、Modugno等学者开创的一般纤维空间上的联络理论框架下进行的。线性Finsler联络的主要恒等式是在一般情况下给出的,然后专门用于一些著名的情况,如Berwald的,Cartan的或Chern-Rund的。通过这种方式,可以很容易地比较它们,并看到一种连接相对于另一种连接的优势。由于我们介绍了两种焊接形式,我们能够描述显着的芬斯勒连接的扭转性能。作为一个应用,与度规相容所隐含的曲率对称性表明,在广义相对论的芬斯勒推广中,平均Cartan挠率为零。这一观察使我们能够得到动力学方程,其中隐含着令人满意的守恒定律。这项工作结束时讨论的又一芬斯勒连接有一些优势,超过嘉当和陈-伦德的。

英文摘要:

We give an introduction to (pseudo-)Finsler geometry and its connections. For most results we provide short and self contained proofs. Our study of the Berwald non-linear connection is framed into the theory of connections over general fibered spaces pioneered by Mangiarotti, Modugno and other scholars. The main identities for the linear Finsler connection are presented in the general case, and then specialized to some notable cases like Berwald's, Cartan's or Chern-Rund's. In this way it becomes easy to compare them and see the advantages of one connection over the other. Since we introduce two soldering forms we are able to characterize the notable Finsler connections in terms of their torsion properties. As an application, the curvature symmetries implied by the compatibility with a metric suggest that in Finslerian generalizations of general relativity the mean Cartan torsion vanishes. This observation allows us to obtain dynamical equations which imply a satisfactory conservation law. The work ends with a discussion of yet another Finsler connection which has some advantages over Cartan's and Chern-Rund's.

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