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On Gauduchon Kähler-Like Manifolds

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Abstract

In a paper by Angella, Otal, Ugarte, and Villacampa, the authors conjectured that on a compact Hermitian manifold, if a Gauduchon connection other than Chern or Strominger is Kähler-like, then the Hermitian metric must be Kähler. They also conjectured that if two Gauduchon connections are both Kähler-like, then the metric must be Kähler. In this paper, we discuss some partial answers to the first conjecture, and give a proof to the second conjecture. In the process, we discovered an interesting “duality” phenomenon amongst Gauduchon connections, which seems to be intimately tied to the question, though we do not know if there is any underlying reason for that from physics.

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Acknowledgements

We would like to thank mathematicians Jixiang Fu, Gabriel Khan, Kefeng Liu, Luigi Vezzoni, Bo Yang, Xiaokui Yang, Shing-Tung Yau, and Xianchao Zhou for their interests and/or help. We are also indebted to the work [2, 14, 26] which inspired this study.

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Zhao is partially supported by National Natural Science Foundations of China with the Grant No. 11801205. Zheng is partially supported by National Natural Science Foundations of China with the Grant Nos. 12071050, 12141101, and by a Chongqing Grant cstc2021ycjh-bgzxm0139.

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Zhao, Q., Zheng, F. On Gauduchon Kähler-Like Manifolds. J Geom Anal 32, 110 (2022). https://doi.org/10.1007/s12220-022-00868-5

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