Compactness of the Complex Green Operator

Details Compactness of the Complex Green Operator Compactness of the Complex Green Operator

2007-06-18

arxiv.org/abs/0706.2645v3

Math. Res. Lett. 15 (2008), no. 4, 761--778

Mathematics

Complex Variables

17 pages. We added an appendix, fixed the proof of a main theorem, and revised the statement of another theorem. Also, we fixe

Scientific paper

Let $\Omega\subset\C^n$ be a bounded smooth pseudoconvex domain. We show that compactness of the complex Green operator $G_{q}$ on $(0,q)$-forms on $b\Omega$ implies compactness of the $\bar{\partial}$-Neumann operator $N_{q}$ on $\Omega$. We prove that if $1 \leq q \leq n-2$ and $b\Omega$ satisfies $(P_q)$ and $(P_{n-q-1})$, then $G_{q}$ is a compact operator (and so is $G_{n-1-q}$). Our method relies on a jump type formula to represent forms on the boundary, and we prove an auxiliary compactness result for an `annulus' between two pseudoconvex domains. Our results, combined with the known characterization of compactness in the $\bar{\partial}$-Neumann problem on locally convexifiable domains, yield the corresponding characterization of compactness of the complex Green operator(s) on these domains.

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