English

Approximation of polynomial hulls by analytic varieties: A counterexample

Complex Variables 2025-07-23 v1

Abstract

We construct a connected, compact set KC2K \subset \mathbb{C}^2 with the following property: there exist points pK^Kp \in \hat{K} \setminus K such that there does not exist a sequence {Aν}\{A_\nu\} of analytic sets AνC2A_\nu \subset\subset \mathbb{C}^2 with boundary satisfying pAνp \in A_\nu for every νN\nu \in \mathbb{N} and limνbAνK\lim_{\nu\to\infty} bA_\nu \subset K. For every point in K^K\hat{K} \setminus K, we explicitly construct a sequence of Poletsky discs, and we compute the weak limit of the pushforwards of the Green current under these discs.

Cite

@article{arxiv.2507.16338,
  title  = {Approximation of polynomial hulls by analytic varieties: A counterexample},
  author = {Tobias Harz},
  journal= {arXiv preprint arXiv:2507.16338},
  year   = {2025}
}
R2 v1 2026-07-01T04:12:55.839Z