On a Class of Landsberg Metrics in Finsler Geometry
On a Class of Landsberg Metrics in Finsler Geometry
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Finsler 几何中的一类 Landsberg 度量
DOI:
10.4153/cjm-2009-064-9
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发表时间:
2009-12-01
影响因子:
0.7
通讯作者:
Shen, Zhongmin
中科院分区:
文献类型:
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作者:
Shen, Zhongmin
In this paper, we study a long existing open problem on Landsberg metrics in Finsler geometry. We consider Finsler metrics defined by a Riemannian metric and a 1-form on a manifold. We show that a regular Finsler metric in this form is Landsbergian if and only if it is Berwaldian. We further show that there is a two-parameter family of functions, phi = phi(s), for which there are a Riemannian metric alpha and a 1-form beta on a manifold M such that the scalar function F = alpha phi(beta/alpha) on TM is an almost regular Landsberg metric, but not a Berwald metric.