具有辛$(1,1)$-形式的复流形的上同调

Pub Date : 2020-04-19 DOI:10.4310/jsg.2023.v21.n1.a2
A. Tomassini, Xu Wang
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引用次数: 0

摘要

设$(X, J)$为具有非退化光滑$d$ -封闭$(1,1)$ -形式$\omega$的复流形。然后我们有一个自然的双复形$\overline{\partial}+\overline{\partial}^\Lambda$,其中$\overline{\partial}^\Lambda$表示$\overline{\partial}$ -算子的辛伴随。研究了关于辛形式$\omega$的$X$的Dolbeault上同群的Hard Lefschetz条件。在\cite{TW}中,我们证明了这样的条件等价于$\partial\overline{\partial}$ -引理的某种辛类似,即$\overline{\partial}\, \overline{\partial}^\Lambda$ -引理,它可以用与上述双复形相关的Bott- Chern和Aeppli上同调来表征。我们得到了Bott- Chern和Aeppli上同调的Nomizu型定理,并证明了$\overline{\partial}\, \overline{\partial}^\Lambda$ -引理在$\omega$的小变形下是稳定的,但在复杂结构的小变形下不稳定。然而,如果我们进一步假设$X$满足$\partial\overline{\partial}$ -引理,那么$\overline{\partial}\, \overline{\partial}^\Lambda$ -引理是稳定的。
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Cohomologies of complex manifolds with symplectic $(1,1)$-forms
Let $(X, J)$ be a complex manifold with a non-degenerated smooth $d$-closed $(1,1)$-form $\omega$. Then we have a natural double complex $\overline{\partial}+\overline{\partial}^\Lambda$, where $\overline{\partial}^\Lambda$ denotes the symplectic adjoint of the $\overline{\partial}$-operator. We study the Hard Lefschetz Condition on the Dolbeault cohomology groups of $X$ with respect to the symplectic form $\omega$. In \cite{TW}, we proved that such a condition is equivalent to a certain symplectic analogous of the $\partial\overline{\partial}$-Lemma, namely the $\overline{\partial}\, \overline{\partial}^\Lambda$-Lemma, which can be characterized in terms of Bott--Chern and Aeppli cohomologies associated to the above double complex. We obtain Nomizu type theorems for the Bott--Chern and Aeppli cohomologies and we show that the $\overline{\partial}\, \overline{\partial}^\Lambda$-Lemma is stable under small deformations of $\omega$, but not stable under small deformations of the complex structure. However, if we further assume that $X$ satisfies the $\partial\overline{\partial}$-Lemma then the $\overline{\partial}\, \overline{\partial}^\Lambda$-Lemma is stable.
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