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On K\"ahler manifolds with non-negative mixed curvature

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arxiv 2408.14043 v1 pith:PLJVUIII submitted 2024-08-26 math.DG math.CV

classification math.DGmath.CV
keywords curvatureahlermanifoldsmixednon-negativecompacttheoremquasi-positive
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In this work, we investigate compact K\"ahler manifolds with non-negative or quasi-positive mixed curvature coming from a linear combination of the Ricci and holomorphic sectional curvature, which covers various notions of curvature considered in the literature. Specifically, we prove a splitting theorem, analogous to the Cheeger-Gromoll splitting theorem, for complete K\"ahler manifolds with non-negative mixed curvature containing a line, and then establish a structure theorem for compact K\"ahler manifolds with non-negative mixed curvature. We also show that the Hodge numbers of compact K\"ahler manifolds with quasi-positive mixed curvature must vanish. Both results are based on the conformal perturbation method.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. First eigenvalue estimates on complete K\"ahler manifolds

    math.DG 2025-07 conditional novelty 7.0 of 10

    On complete Kähler manifolds with HSC ≥ 2, the first eigenvalue of the Laplacian is at least (320n+256)/(81n+63), which tends to 320/81 as n grows.

  2. A sharp spectral splitting theorem

    math.DG 2024-12 conditional novelty 7.0 of 10

    If a complete noncompact n-manifold with at least two ends satisfies lambda1(-gamma Delta + Ric) >= 0 for some gamma < 4/(n-1), then it splits isometrically as R x N with compact N and Ric_N >= 0; the constant is sharp.

  3. Fundamental groups of compact K\"ahler manifolds with semi-positive holomorphic sectional curvature

    math.DG 2025-02 conditional novelty 5.0 of 10

    A compact Kähler manifold with semi-positive holomorphic sectional curvature is a locally trivial fibration over a finite étale quotient of a torus with rationally connected projective fibers.

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