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We prove the following for a bounded convex planar domain that is symmetric with respect to both coordinate axes. Consider a centered rectangle with sides parallel to the axes that strictly contains the domain. If the domain is not a…

谱理论 · 数学 2007-05-23 Burgess Davis , Majid Hosseini

We prove that a $C^{1,1}$-smooth bounded domain $D$ in $\C^n$ is linearly convex if and only if the convex hull of any two discs in $D$ with common center lies in $D.$

复变函数 · 数学 2014-05-23 Nikolai Nikolov , Pascal J. Thomas

We show that domains, that allow for convex functions with unbounded gradient at their boundary, are convex.

经典分析与常微分方程 · 数学 2007-05-23 Oliver C. Schnürer

In this paper we study the automorphism group of smoothly bounded convex domains. We show that such a domain is biholomorphic to a "polynomial ellipsoid" (that is, a domain defined by a weighted homogeneous balanced polynomial) if and only…

复变函数 · 数学 2017-01-17 Andrew M. Zimmer

We construct a strictly pseudoconvex domain with smooth boundary whose squeezing function is not plurisubharmonic.

复变函数 · 数学 2016-04-28 John Erik Fornæss , Nikolay Shcherbina

It is shown that any non-degenerate $\mathbb C$-convex domain in $\mathbb C^n$ is uniformly squeezing. It is also found the precise behavior of the squeezing function near a Dini-smooth boundary point of a plane domain.

复变函数 · 数学 2018-08-14 Nikolai Nikolov , Lyubomir Andreev

Chaidez and Edtmair have recently found the first example of dynamically convex domains in $\mathbb R^4$ that are not symplectomorphic to convex domains (called symplectically convex domains), answering a long-standing open question. In…

辛几何 · 数学 2023-08-30 Julien Dardennes , Jean Gutt , Vinicius G. B. Ramos , Jun Zhang

In recent work by Zimmer it was proved that if $\Omega\subset\mathbb C^n$ is a bounded convex domain with $C^\infty$-smooth boundary, then $\Omega$ is strictly pseudoconvex provided that the squeezing function approaches one as one…

复变函数 · 数学 2018-10-17 John Erik Fornæss , Erlend Fornæss Wold

We develop a theory of planar, origin-symmetric, convex domains that are inextensible with respect to lattice covering, that is, domains such that augmenting them in any way allows fewer domains to cover the same area. We show that…

度量几何 · 数学 2017-08-11 Yoav Kallus

The purpose of this article is twofold. The first aim is to characterize $h$-extendibility of smoothly bounded pseudoconvex domains in $\mathbb C^{n+1}$ by their noncompact automorphism groups. Our second goal is to show that if the…

复变函数 · 数学 2019-12-25 Ninh Van Thu , Nguyen Quang Dieu

The symmetrized bidisc ${\textbf{G}}_{2}$ is defined by $${\textbf{G}}_{2}:=\{(z_1+z_2,z_1z_2)\in\mathbb{C}^2: |z_1|<1,|z_2|<1,\; z_1,z_2\in\mathbb{C}\}.$$ It is a bounded inhomogeneous pseudoconvex domain without $\mathcal{C}^1$ boundary,…

复变函数 · 数学 2017-10-27 Zhenhan Tu , Shuo Zhang

In this article we construct many examples of properly convex irreducible domains divided by Zariski dense relatively hyperbolic groups in every dimension at least 3. This answers a question of Benoist. Relative hyperbolicity and non-strict…

几何拓扑 · 数学 2025-07-16 Pierre-Louis Blayac , Gabriele Viaggi

We show that the graph of a holomorphic motion of the unit disc cannot be biholomorphic to a strongly pseudoconvex domain in C n .

复变函数 · 数学 2016-12-20 Hervé Gaussier , Harish Seshadri

We study the homeomorphic extension of biholomorphisms between convex domains in $\mathbb C^d$ without boundary regularity and boundedness assumptions. Our approach relies on methods from coarse geometry, namely the correspondence between…

复变函数 · 数学 2019-11-26 Filippo Bracci , Hervé Gaussier , Andrew Zimmer

In this paper, we first establish several general sufficient conditions for the biholomorphic convex mappings on the bounded convex balanced domain $D_{p}^n(p_{j}\geq 2,j=1,\cdots,n)$ in $C^{n}$, which extend some related results of earlier…

复变函数 · 数学 2015-11-24 Ni Li , Ming-Sheng Liu

In this paper, finite type domains with hyperbolic orbit accumulation points are studied. We prove, in case of $\mathbb{C}^2$, it has to be a (global) pseudoconvex domain, after an assumption of boundary regularity. Moreover, one of the…

复变函数 · 数学 2014-01-14 Bingyuan Liu

The Dirac operator with MIT bag boundary condition in a bounded convex domain is shown to be always self-adjoint in the $H^1$-setting. This allows one to show that such operators appear as limit of Dirac operators with large positive mass…

偏微分方程分析 · 数学 2025-09-26 Konstantin Pankrashkin

It is shown that two strictly pseudoconvex Stein domains with real analytic boundaries have biholomorphic universal coverings provided that their boundaries are locally biholomorphically equivalent. This statement can be regarded as a…

复变函数 · 数学 2009-04-13 Stefan Nemirovski , Rasul Shafikov

We prove that for any non-symmetric irreducible divisible convex set, the proximal limit set is the full projective boundary.

度量几何 · 数学 2021-06-15 Pierre-Louis Blayac

We construct a bounded domain $\Omega$ in $\mathbb{C}^2$ with boundary of class $\mathcal{C}^{1,1}$, such that $\overline{\Omega}$ has a Stein neighborhood basis, but is not $s$-H-convex for any real number $s\geq{1}$.

复变函数 · 数学 2018-07-27 Lars Simon , Berit Stensønes