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Nonexistence for complete Kähler–Einstein metrics on some noncompact manifolds

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Let M be a compact Kähler manifold and N be a subvariety with codimension greater than or equal to 2. We show that there are no complete Kähler–Einstein metrics on \(M-N\). As an application, let E be an exceptional divisor of M. Then \(M-E\) cannot admit any complete Kähler–Einstein metric if blow-down of E is a complex variety with only canonical or terminal singularities. A similar result is shown for pairs.

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Acknowledgments

We thank Chenglong Yu for discussions on material in Sect. 2, where he made a critical observation for Lemma 2.1. P. Gao and S.-T. Yau are supported by NSF Grants DMS-1308244 and PHY-0937443, and W. Zhou is partially supported by China Postdoctoral Science Foundation Grant No. 2015M571479.

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Correspondence to Wubin Zhou.

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Gao, P., Yau, ST. & Zhou, W. Nonexistence for complete Kähler–Einstein metrics on some noncompact manifolds. Math. Ann. 369, 1271–1282 (2017). https://doi.org/10.1007/s00208-016-1486-y

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  • DOI: https://doi.org/10.1007/s00208-016-1486-y

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