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2026-09-01 17:24 UTC · math.CV · math.CV

Analytic discs and compactness of the $\bar\partial$-Neumann operator

Qianyun Wang, Yuan Yuan, Xu Zhang

We construct a bounded pseudoconvex complete Reinhardt domain $Ω$ with smooth boundary in $\mathbb{C}^3$ such that the $\bar\partial$-Neumann operator $N_1$ is compact although $bΩ$ contains an analytic disc and thus also fails Catlin's Property $(P)$ and McNeal's Property $(\tilde P)$. This example solves an open problem on compactness of the $\bar\partial$-Neumann operator in the negative.
arXiv abstractPDF

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