Asian Journal of Mathematics

Volume 12 (2008)

Number 1

Complex Product Manifolds Cannot be Negatively Curved

Pages: 145 – 150



Harish Seshadri

Fangyang Zheng


We show that if M = X × Y is the product of two complex manifolds (of positive dimensions), then M does not admit any complete Kähler metric with bisectional curvature bounded between two negative constants. More generally, a locally-trivial holomorphic fibre-bundle does not admit such a metric.


Kähler manifolds; product manifolds; bisectional curvature; negative curvature

2010 Mathematics Subject Classification

Primary 53B25. Secondary 53C40.

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