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It is an observation due to J.J. Kohn that for a smooth bounded pseudoconvex domain D in $C^n$ there exists s>0 such that the dbar-Neumann operator on D maps $W^s_{(0,1)}(D)$ (the space of $(0,1)$-forms with coefficient functions in…

Complex Variables · Mathematics 2021-03-08 Sonmez Sahutoglu

We study the boundary regularity of proper holomorphic mappings between strictly pseudoconvex domains with $C^2$-boundaries.

Complex Variables · Mathematics 2021-04-27 Alexandre Sukhov

Motivated by the way two special domains, namely the symmetrized bidisc and the tetrablock, could be defined as the images of $2$-proper holomorphic images of classical Cartan domains, we present a general approach to study $2$-proper…

Complex Variables · Mathematics 2025-07-17 Gargi Ghosh , Włodzimierz Zwonek

For convex domains with $C^{1,\epsilon}$ boundary we give a precise description of the automorphism group: if an orbit of the automorphism group accumulates on at least two different closed complex faces of the boundary, then the…

Complex Variables · Mathematics 2021-02-03 Andrew Zimmer

We study the possible dimensions that the groups of holomorphic automorphisms of hyperbolic Reinhardt domains can have. We are particularly interested in the problem of characterizing Reinhardt domains with automorphism group of prescribed…

Complex Variables · Mathematics 2007-05-23 James A. Gifford , Alexander V. Isaev , Steven G. Krantz

Applying a theorem due to Diederich and Ohsawa on weighted Bergman kernels, we characterize some Hartogs domains by their holomorphic automorphisms.

Complex Variables · Mathematics 2013-11-13 Hyeseon Kim , Atsushi Yamamori

We study the fixed point sets of holomorphic self-maps of a bounded domain in ${\Bbb C}^n$. Specifically we investigate the least number of fixed points in general position in the domain that forces any automorphism (or endomorphism) to be…

Complex Variables · Mathematics 2007-05-23 Buma Fridman , Daowei Ma

We describe all possibilities of existence of non-elementary proper holomorphic maps between non-hyperbolic Reinhardt domains in $\mathbb C^2$ and the corresponding pairs of domains.

Complex Variables · Mathematics 2012-06-07 L. Kosinski

We define metrics in space that are natural counterparts of the hyperbolic metric in plane domains, using the characterization of the hyperbolic metric due to Beardon and Pommerenke. We obtain inequalities for these metrics under…

Complex Variables · Mathematics 2026-05-27 Aimo Hinkkanen , Poranee Khayo

Let $H^n$ be the metric space of all bounded domains in $C^n$ with the metric equal to the Hausdorff distance between boundaries of domains. We prove that the dimension of the group of automorphisms of domains is an upper semicontinuous…

Complex Variables · Mathematics 2007-05-23 Buma L. Fridman , Daowei Ma , Evgeny A. Poletsky

The set \[ \Gamma {\stackrel{\rm def}{=}} \{(z+w,zw):|z|\leq 1,|w|\leq 1\} \subset {\mathbb{C}}^2 \] has intriguing complex-geometric properties; it has a 3-parameter group of automorphisms, its distinguished boundary is a ruled surface…

Complex Variables · Mathematics 2017-12-25 Jim Agler , Zinaida A. Lykova , Nicholas J. Young

This paper deals with proper holomorphic self-maps of smoothly bounded pseudoconvex domains in $\C^2$. We study the dynamical properties of their extension to the boundary and show that their non-wandering sets are always contained in the…

Complex Variables · Mathematics 2007-05-23 Emmanuel Opshtein

Given a fixed-point free compact holomorphic self-map $f$ on a bounded symmetric domain $D$, which may be infinite dimensional, we establish the existence of a family $\{H(\xi, \lambda)\}_{\lambda >0}$ of convex $f$-invariant domains at a…

Complex Variables · Mathematics 2016-12-30 Cho-Ho Chu , Michael Rigby

We survey results arising from the study of domains in C^n with non-compact automorphism group. Beginning with a well-known characterization of the unit ball, we develop ideas toward a consideration of weakly pseudoconvex (and even…

Complex Variables · Mathematics 2016-09-06 A. V. Isaev , S. G. Krantz

In this paper we establish two boundary versions of the Schwarz lemma. The first is for general holomorphic self maps of bounded convex domains with $C^2$ boundary. This appears to be the first boundary Schwarz lemma for general holomorphic…

Complex Variables · Mathematics 2018-10-24 Andrew Zimmer

For a compact $(2n+1)$-dimensional smooth manifold, let $\mu_M : B Diff_\partial (D^{2n+1}) \to B Diff (M)$ be the map that is defined by extending diffeomorphisms on an embedded disc by the identity. By a classical result of Farrell and…

Algebraic Topology · Mathematics 2023-08-02 Johannes Ebert

We explore the horofunction compactification of complete hyperbolic domains in complex Euclidean space equipped with the Kobayashi distance. We provide a sufficient condition under which, given a domain $\Omega$ as above, the identity map…

Complex Variables · Mathematics 2025-12-09 Vikramjeet Singh Chandel , Sushil Gorai , Anwoy Maitra , Amar Deep Sarkar

Let $M^{0}$ be a complete hyperbolic $3$-manifold whose conformal boundary is a closed Riemann surface $S$ of genus $g \geq 2$. If $M=M^{0} \cup S$, then let ${\rm Aut}(S;M)$ be the group of conformal automorphisms of $S$ which extend to…

Geometric Topology · Mathematics 2024-10-15 Rubén A. Hidalgo

Let $\mathcal{T}_K(D)$ be the class of $K$-quasiconformal automorphisms of a domain $D\subsetneq \mathbb{R}^n$ with identity boundary values. Teichm\"uller's problem is to determine how far a given point $x\in D$ can be mapped under a…

Complex Variables · Mathematics 2020-10-23 Qingshan Zhou , Antti Rasila

It is shown that certain diffeomorphism or homeomorphism groups with no restriction on support of an open manifold with finite number of ends are bounded. It follows that these groups are uniformly perfect. In order to characterize the…

Differential Geometry · Mathematics 2011-04-20 Tomasz Rybicki