Abstract
In this paper, the Cartan tensors of the (α, β)-norms are investigated in detail. Then an equivalence theorem of (α, β)-norms is proved. As a consequence in Finsler geometry, general (α, β)-metrics on smooth manifolds of dimension n ⩾ 4 with vanishing Landsberg curvatures must be Berwald manifolds.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (Grant Nos. 11221091, 11271062, 11501067, 11571184, 11871126 and 11931007), China Scholarship Council Visiting Scholar Program and the Fundamental Research Funds for the General Universities and Nankai Zhide Foundation. The third author expresses his appreciation to Professor Guofang Wang for his warm hospitality and discussions on mathematics, while he stayed in Mathematisches Institut of Albert-Ludwigs-Universität Freiburg in 2018.
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In Memory of Professor Zhengguo Bai (1916–2015)
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Feng, H., Han, Y. & Li, M. An equivalence theorem of a class of Minkowski norms and its applications. Sci. China Math. 64, 1429–1446 (2021). https://doi.org/10.1007/s11425-020-1812-3
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DOI: https://doi.org/10.1007/s11425-020-1812-3
Keywords
- Landsberg manifold
- Berwald manifold
- general (α, β)-metric
- equivalence theorem
- Cartan tensor
- parallel transport