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<p>Compact Kähler manifolds satisfy several nice Hodge-theoretic properties such as the Hodge symmetry, the Hard Lefschetz property and the Hodge–Riemann bilinear relations, etc. In this note, we investigate when such nice properties hold on compact complex manifolds with semistable degenerations. For compact complex manifolds which can be obtained as smoothings of SNC varieties without triple intersection locus, we show the Hodge symmetry when the monodromy logarithm induces isomorphisms on the associated graded pieces of the weight filtrations of the limiting mixed Hodge structures. We also show the Hodge–Riemann relations on <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(H^3\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>H</mi> <mn>3</mn> </msup> </math></EquationSource> </InlineEquation> of compact complex 3-folds with such semistable degenerations under some conditions.</p>

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On Hodge structures of compact complex manifolds with semistable degenerations

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Taro Sano

摘要

Compact Kähler manifolds satisfy several nice Hodge-theoretic properties such as the Hodge symmetry, the Hard Lefschetz property and the Hodge–Riemann bilinear relations, etc. In this note, we investigate when such nice properties hold on compact complex manifolds with semistable degenerations. For compact complex manifolds which can be obtained as smoothings of SNC varieties without triple intersection locus, we show the Hodge symmetry when the monodromy logarithm induces isomorphisms on the associated graded pieces of the weight filtrations of the limiting mixed Hodge structures. We also show the Hodge–Riemann relations on \(H^3\) H 3 of compact complex 3-folds with such semistable degenerations under some conditions.