On Compact Hermitian Manifolds with Flat Gauduchon Connections
On Compact Hermitian Manifolds with Flat Gauduchon Connections
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DOI:
10.1007/s10114-018-7409-y
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发表时间:
2017-09
期刊:
影响因子:
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通讯作者:
Bo Yang;Fangting Zheng
中科院分区:
文献类型:
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作者:
Bo Yang;Fangting Zheng
Given a Hermitian manifold (Mn,g), the Gauduchon connections are the one parameter family of Hermitian connections joining the Chern connection and the Bismut connection. We will callthes-Gauduchon connection ofM, where ∇cand ∇bare respectively the Chern and Bismut connections. It is natural to ask when a compact Hermitian manifold could admit a flats-Gauduchon connection. This is related to a question asked by Yau. The cases withs= 0 (a flat Chern connection) ors= 2 (a flat Bismut connection) are classified respectively by Boothby in the 1950s or by the authors in a recent joint work with Q. Wang. In this article, we observe that if eitherorands≠ 0, thengis Kähler. We also show that, whenn= 2,gis always Kähler unlesss= 2. Therefore non-Kähler compact Gauduchon flat surfaces are exactly isosceles Hopf surfaces.