English

A weak notion of strict pseudo-convexity. Applications and examples

Complex Variables 2019-11-06 v3 Functional Analysis

Abstract

Let Ω\Omega be a bounded C{\mathcal{C}}^{\infty}-smoothly bounded domain in Cn.{\mathbb{C}}^{n}. For such a domain we define a new notion between strict pseudo-convexity and pseudo-convexity: the size of the set WW of weakly pseudo-convex points on Ω\partial \Omega is small with respect to Minkowski dimension: near each point in the boundary Ω,\partial \Omega , there is at least one complex tangent direction in which the slices of WW has a upper Minkowski dimension strictly smaller than 2.2. We propose to call this notion "strong pseudo-convexity"; this word is free since "strict pseudo-convexity" gets the precedence in the case where all the points in Ω\partial \Omega are stricly pseudo-convex. For such domains we prove that if SS is a separated sequence of points contained in the support of a divisor in the Blaschke class, then a canonical measure associated to SS is bounded. If moreover the domain is pp-regular, and the sequence SS is dual bounded in the Hardy space Hp(Ω),H^{p}(\Omega), then the previous measure is Carleson. As an application we prove a theorem on interpolating sequences in bounded convex domains of finte type in Cn.{\mathbb{C}}^{n}. Examples of such pseudo-convex domains are finite type domains in C2,{\mathbb{C}}^{2}, finite type convex domains in Cn,{\mathbb{C}}^{n}, finite type domains which have locally diagonalizable Levi form, domains with real analytic boundary and of course, stricly pseudo-convex domains in Cn.{\mathbb{C}}^{n}. Domains like z12+exp{1z22}<1,|{z_{1}}| ^{2}+\exp \{1-|{z_{2}}| ^{-2}\}<1, which are not of finite type are nevertheless strongly pseudo-convex, in this sense.

Keywords

Cite

@article{arxiv.0906.1956,
  title  = {A weak notion of strict pseudo-convexity. Applications and examples},
  author = {Eric Amar},
  journal= {arXiv preprint arXiv:0906.1956},
  year   = {2019}
}

Comments

This is completely rewritten and expanded thanks to incisive questions and a lot of deep suggestions done by the referee. This will appear in Annali della Scuola Normale Superiore di Pisa

R2 v1 2026-06-21T13:12:01.654Z