Hearing pseudoconvexity in Lipschitz domains with holes via $\overline\partial$

TL;DR

This paper characterizes the pseudoconvexity of Lipschitz domains with holes in complex spaces using Dolbeault cohomology and spectral properties of the $ar{ ext{d}}$-Neumann Laplacian, linking geometric and spectral conditions.

Contribution

It provides new spectral criteria for pseudoconvexity of domains with Lipschitz and smooth boundaries via Dolbeault cohomology and $ar{ ext{d}}$-Neumann Laplacian analysis.

Findings

Pseudoconvexity characterized by vanishing Dolbeault cohomology groups.

Spectral conditions on the $ar{ ext{d}}$-Neumann Laplacian equivalent to pseudoconvexity.

Results extend to Stein manifolds and domains with Lipschitz and $C^2$ boundaries.

Abstract

Let $\Omega=\widetilde{\Omega}\setminus \overline{D}$ where $\widetilde{\Omega}$ is a bounded domain with connected complement in $\mathbb C^n$ (or more generally in a Stein manifold) and $D$ is relatively compact open subset of $\widetilde{\Omega}$ with connected complement in $\widetilde{\Omega}$. We obtain characterizations of pseudoconvexity of $\widetilde{\Omega}$ and $D$ through the vanishing or Hausdorff property of the Dolbeault cohomology groups on various function spaces. In particular, we show that if the boundaries of $\widetilde{\Omega}$ and $D$ are Lipschitz and $C^2$-smooth respectively, then both $\widetilde{\Omega}$ and $D$ are pseudoconvex if and only if $0$ is not in the spectrum of the $\overline\partial$-Neumann Laplacian on $(0, q)$-forms for $1\le q\le n-2$ when $n\geq 3$; or $0$ is not a limit point of the spectrum of the $\overline\partial$-Neumannn Laplacian on $(0, 1)$-forms when $n=2$.