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We consider proper holomorphic maps of ball complements and differences in complex euclidean spaces of dimension at least two. Such maps are always rational, which naturally leads to a related problem of classifying rational maps taking…

Complex Variables · Mathematics 2025-11-14 Abdullah Al Helal , Jiří Lebl , Achinta Kumar Nandi

The aim of this paper is to present a simple way to generate proper monomial rational maps between generalized balls and via the relations between generalized balls and bounded symmetric domains of type I, we suggest new examples of proper…

Complex Variables · Mathematics 2015-01-19 Aeryeong Seo

We study the complexity of holomorphic isometries and proper maps from the complex unit ball to type IV classical domains. We investigate on degree estimates of holomorphic isometries and holomorphic maps with minimum target dimension. We…

Complex Variables · Mathematics 2016-09-27 Ming Xiao , Yuan Yuan

In this paper I survey some recent results on finite determination, convergence, and approximation of formal mappings between real submanifolds in complex spaces. A number of conjectures are also given.

Complex Variables · Mathematics 2007-05-23 Linda Preiss Rothschild

The explicit form of proper holomorphic mappings between complex ellipsoids is given. Using this description, we characterize the existence of proper holomorphic mappings between generalized Hartogs triangles and give their explicit form.…

Complex Variables · Mathematics 2017-09-18 Pawel Zapalowski

We introduce a natural notion of holomorphic map between generalized complex manifolds and we prove some related results on Dirac structures and generalized Kaehler manifolds.

Differential Geometry · Mathematics 2015-05-13 Liviu Ornea , Radu Pantilie

In this paper, we prove a rigidity result for proper holomorphic maps between unit balls that have many symmetries and which extend to H\"older continuous maps on the boundary, with H\"older exponent strictly greater than 1/2.

Complex Variables · Mathematics 2026-02-20 Kyle Huang , Jinwoo Park , Aleksander Skenderi , Jaan Amla Srimurthy , Rou Wen , Andrew Zimmer

In this paper, we give an explicit criterion when a rational holomorphic map between balls is equivalent to a polynomial holomorphic map. Making use of this criterion, we show that any proper rational holomorphic map from B^2 into B^N of…

Complex Variables · Mathematics 2007-10-26 Xiaojun Huang , Shanyu Ji , Yuan Zhang

We study proper rational maps from the unit disk to balls in higher dimensions. After gathering some known results, we study the moduli space of unitary equivalence classes of polynomial proper maps from the disk to a ball, and we establish…

Complex Variables · Mathematics 2016-08-10 John P. D'Angelo , Zhenghui Huo , Ming Xiao

We describe a part of the recent developments in the theory of separately holomorphic mappings between complex analytic spaces. Our description focuses on works using the technique of holomorphic discs.

Complex Variables · Mathematics 2009-01-15 Viet-Anh Nguyen

In this note, we prove a rigidity result for proper holomorphic maps between unit balls that have many symmetries and which extend to $\mathcal{C}^2$-smooth maps on the boundary.

Complex Variables · Mathematics 2023-05-31 Edgar Gevorgyan , Haoran Wang , Andrew Zimmer

In this paper (Math. Res. Lett. 13 (2006). No 4, 509-523), the authors established a pseudo-normal form for proper holomoprhic mappings between balls in complex spaces with degenerate rank. This then was used to give a complete…

Complex Variables · Mathematics 2007-05-23 Xiaojun Huang , Shanyu Ji , Dekang Xu

Using elementary number theory, we prove several results about the complexity of CR mappings between spheres. It is known that CR mappings between spheres, invariant under finite groups, lead to sharp bounds for degree estimates on real…

Complex Variables · Mathematics 2009-03-13 John P. D'Angelo , Jiri Lebl

We display four approximation theorems for manifold-valued mappings. The first one approximates holomorphic embeddings on pseudoconvex domains in $\Bbb C^n$ with holomorphic embeddings with dense images. The second theorem approximates…

Complex Variables · Mathematics 2023-06-21 Giovanni Domenico Di Salvo

Given a proper, rational map of balls, D'Angelo and Xiao introduced five natural groups encoding properties of the map. We study these groups using a recently discovered normal form for rational maps of balls. Using this normal form, we…

Complex Variables · Mathematics 2025-11-14 Dusty Grundmeier , Jiří Lebl

We study proper holomorphic mappings between strictly pseudoconvex domains with low boundary regularity.

Complex Variables · Mathematics 2021-08-11 Alexandre Sukhov

We derive an upper bound on the size of a ball such that the image of the ball under quadratic map is strongly convex and smooth. Our result is the best possible improvement of the analogous result by Polyak in the case of quadratic map. We…

Optimization and Control · Mathematics 2017-10-27 Anatoly Dymarsky

In this paper, we define the notion of a mapping on soft classes and study several properties of images and inverse images of soft sets supported by examples and counterexamples. Finally, these notions have been applied to the problem of…

Logic · Mathematics 2010-06-28 Athar Kharal , B. Ahmad

A complete characterization of proper holomorphic mappings between domains from the class of all pseudoconvex Reinhardt domains in $\C^2$ with the logarithmic image equal to a strip or a half-plane is given.

Complex Variables · Mathematics 2009-01-10 Lukasz Kosinski

This work focuses on the degree bound of maps between balls with maximum geometric rank and minimum target dimension where this geometric rank occurs. Specifically, we show that rational proper maps between $\mathbb{B}_n$ and $\mathbb{B}_N$…

Complex Variables · Mathematics 2024-10-22 Abdullah Al Helal
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