Kähler-Einstein metrics and obstruction flatness of circle bundles
Kähler-Einstein metrics and obstruction flatness of circle bundles
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圆束的克勒-爱因斯坦度量和阻碍平坦度
DOI:
10.1016/j.matpur.2023.07.003
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Xu, Hang
中科院分区:
文献类型:
--
作者:
Ebenfelt, Peter;Xiao, Ming;Xu, Hang
Obstruction flatness of a strongly pseudoconvex hypersurface Σ in a complex manifold refers to the property that any (local) Kähler-Einstein metric on the pseudoconvex side of Σ, complete up to Σ, has a potential− log u such that u is C∞-smooth up to Σ. In general, u has only a finite degree of smoothness up to Σ. In this paper, we study obstruction flatness of hypersurfaces Σ that arise as unit circle bundles S (L) of negative Hermitian line bundles (L, h) over Kähler manifolds (M, g). We prove that if (M, g) has constant Ricci eigenvalues, then S (L) is obstruction flat. If, in addition, all these eigenvalues are strictly less than one and (M, g) is complete, then we show that the corresponding disk bundle admits a complete Kähler-Einstein metric. Finally, we give a necessary and sufficient condition for obstruction flatness of S (L) when (M, g) is a Kähler surface (dim M= 2) with constant scalar curvature.
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DOI:
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发表时间:
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期刊:
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