arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.04764math.DG
收藏

自然约化齐性空间上的Jacobi关系

Jacobi relations on naturally reductive homogeneous spaces

Tillmann Jentsch, Gregor Weingart

摘要:

自然约化空间一般可以看作是黎曼对称空间的充分推广。然而,有一些比其他更接近对称空间。一方面,在复空间型上有一系列的霍普夫纤维化,包括具有H型度量的海森堡群。另一方面,在六维和七维中存在某些自然约化空间,它们的挠形式具有显著的代数性质。所有这些空间都推广了$3$ -维自然约化空间的几何或代数性质,并具有以下共同点:沿着每一测地线,Jacobi算子满足一个常系数的常微分方程,该常系数可以独立于给定的测地线而选择。

英文摘要:

Naturally reductive spaces, in general, can be seen as an adequate generalization of Riemannian symmetric spaces. Nevertheless, there are some that are closer to symmetric spaces than others. On the one hand, there is the series of Hopf fibrations over complex space forms, including the Heisenberg groups with their metrics of type H. On the other hand, there exist certain naturally reductive spaces in dimensions six and seven whose torsion forms have a distinguished algebraic property. All these spaces generalize geometric or algebraic properties of $3$--dimensional naturally reductive spaces and have the following point in common: along every geodesic the Jacobi operator satisfies an ordinary differential equation with constant coefficients which can be chosen independently of the given geodesic.

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。

↑