当前位置: X-MOL 学术Bull. Iran. Math. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On Homogeneous Weakly Stretch Finsler Metrics
Bulletin of the Iranian Mathematical Society ( IF 0.7 ) Pub Date : 2021-02-27 , DOI: 10.1007/s41980-020-00498-z
Hosein Tondro Vishkaei , Megerdich Toomanian , Reza Chavosh Katamy , Mehdi Nadjafikhah

In this paper, we show that every homogeneous Finsler metric is a weakly stretch metric if and only if it reduces to a weakly Landsberg metric. This yields an extension of Tayebi–Najafi’s result that proved the result for the class of stretch Finsler metrics. Let \(F:=\alpha \phi (\beta /\alpha )\) be a homogeneous weakly stretch \((\alpha ,\beta )\)-metric on a manifold M. We show that if \(\phi \) is of polynomial type, then F is a Berwald metric. Also, we prove that F is a Berwald metric if and only if it has vanishing S-curvature. Then, we show that F is a Douglas metric if and only if it reduces to a Berwald metric. In continue, we show that every homogenous weakly stretch surface is a Landsberg surface. Finally, we characterize homogeneous weakly stretch spherically symmetric Finsler metrics.



中文翻译:

关于齐次弱拉伸Finsler度量

在本文中,我们表明,当且仅当将其简化为弱Landsberg度量时,每个齐次Finsler度量才是弱拉伸度量。这产生了Tayebi–Najafi结果的扩展,证明了扩展Finsler指标类别的结果。令\(F:= \ alpha \ phi(\ beta / \ alpha)\)为流形M上的均质弱拉伸\((\ alpha,\ beta)\) -度量。我们证明,如果\(\ phi \)是多项式类型,则F是Berwald度量。而且,我们证明F是Berwald度量,当且仅当它具有消失的S曲率。然后,我们证明F当且仅当它减少为Berwald度量时,才是Douglas度量。接下来,我们显示每个均匀的弱拉伸表面都是Landsberg表面。最后,我们描述了均质的弱拉伸球对称Finsler度量。

更新日期:2021-02-28
down
wechat
bug