Mathematics – Differential Geometry
Scientific paper
2007-07-04
Comm. Anal. Geom. 15 (2007), no.5, 1063-1086.
Mathematics
Differential Geometry
21 pages; v2 added some remarks and references; v3 fixed typos, final version to appear in Communications in Analysis and Geom
Scientific paper
We prove a version of Yau's Schwarz Lemma for general almost-complex manifolds equipped with Hermitian metrics. This requires an extension to this setting of the Laplacian comparison theorem. As an application we show that the product of two almost-complex manifolds does not admit any complete Hermitian metric with bisectional curvature bounded between two negative constants that satisfies some additional mild assumptions.
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