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We construct a complete proper holomorphic embedding from any strictly pseudoconvex domain with $\mathcal{C}^2$-boundary in $\mathbb{C}^n$ into the unit ball of $\mathbb{C}^N$, for $N$ large enough, thereby answering a question of Alarcon…

Complex Variables · Mathematics 2015-07-28 Barbara Drinovec Drnovsek

This paper defines a pairing of two finite Hopf C*-algebras $A$ and $B$, and investigates the interactions between them. If the pairing is non-degenerate, then the quantum double construction is given. This construction yields a new finite…

Quantum Algebra · Mathematics 2009-08-10 Ming Liu , Li Ning Jiang , Guo Sheng Zhang

In this note, we consider models in $\mathbb C^2$. The purpose of this note is twofold. We first show a characterization of models in $\mathbb C^2$ by their noncompact automorphism groups. Then we give an explicit description for…

Complex Variables · Mathematics 2014-10-09 Ninh Van Thu , Mai Anh Duc

We establish logical equivalence between statements involving * the Cuntz C*-algebra $\mathcal O_\infty$ with its canonical diagonal; * graph C*-algebras with their canonical diagonals; * Leavitt path algebras over general fields with their…

Operator Algebras · Mathematics 2025-11-12 Søren Eilers , Efren Ruiz

An algebraic domain is a closed topological subsurface of a real affine plane whose boundary consists of disjoint smooth connected components of real algebraic plane curves. We study the geometric shape of an algebraic domain by collapsing…

Geometric Topology · Mathematics 2023-06-09 Arnaud Bodin , Patrick Popescu-Pampu , Miruna-Stefana Sorea

We show that there are no tight nonholomorphic maps from irreducible domains into exceptional codomains, the only exception being the already known tight nonholomorphic maps from the Poincare disc. This follows up on previous work by the…

Differential Geometry · Mathematics 2014-10-30 Oskar Hamlet , Takayuki Okuda

We classify the tube domains in C^4 with affinely homogeneous base whose boundary contains a non-degenerate affinely homogeneous hypersurface. It follows that these domains are holomorphically homogeneous and amongst them there are four new…

Complex Variables · Mathematics 2007-05-23 Michael Eastwood , Vladimir Ezhov , Alexander Isaev

We solve the problem of simultaneously embedding properly holomorphically into $\Bbb C^2$ a whole family of $n$-connected domains $\Omega_r\subset\Bbb P^1$ such that none of the components of $\Bbb P^1\setminus\Omega_r$ reduces to a point,…

Complex Variables · Mathematics 2023-06-21 Giovanni Domenico Di Salvo , Tyson Ritter , Erlend F. Wold

We consider links of complex isolated hypersurface singularities in $\mathbb{C}^{n+1}$ and study differentiable maps defined by restricting holomorphic functions to the links. We give an explicit example in which such a restriction gives a…

Geometric Topology · Mathematics 2024-02-06 Osamu Saeki , Shuntaro Sakurai

For a bounded domain equipped with a piecewise Lipschitz continuous Riemannian metric g, we consider harmonic map from $(\Omega, g)$ to a compact Riemannian manifold $(N,h)\subset\mathbb R^k$ without boundary. We generalize the notion of…

Analysis of PDEs · Mathematics 2011-08-23 Haigang Li , Changyou Wang

In this paper we studied a broader type of generalized balls which are domains on the complex projective with possibly Levi-degenerate boundaries. We proved rigidity theorems for proper holomorphic mappings among them by exploring the…

Complex Variables · Mathematics 2021-04-14 Sui-Chung Ng , Yuehuan Zhu

Given two nonsingular real algebraic varieties V and W, we consider the problem of deciding whether a smooth map f: V -> W can be approximated by regular maps in the space of smooth maps from V to W. Our main result is a complete solution…

Algebraic Geometry · Mathematics 2009-03-31 Frederic Mangolte

We show that the algebraic boundaries of the regions of real binary forms with fixed typical rank are always unions of dual varieties to suitable coincident root loci.

Algebraic Geometry · Mathematics 2020-09-10 Maria Chiara Brambilla , Giovanni Staglianò

We study a class of holomorphic matrix models. The integrals are taken over middle dimensional cycles in the space of complex square matrices. As the size of the matrices tends to infinity, the distribution of eigenvalues is given by a…

High Energy Physics - Theory · Physics 2009-11-10 Giovanni Felder , Roman Riser

A characterization of non-hyperbolic pseudoconvex Reinhardt domains in $\mathbb C^2$ for which the answer to the Serre problem is positive is given.

Complex Variables · Mathematics 2012-06-07 Lukasz Kosinski

We approximate smooth maps defined on non-compact totally real manifolds by holomorphic automorphisms of $\mathbb C^n$.

Complex Variables · Mathematics 2014-01-14 Frank Kutzschebauch , Erlend Fornaess Wold

For any Kahler surface which admits no nonzero holomorphic vectorfields, we consider the group of holomorphic automorphisms which induce identity on the second rational cohomology. Assuming the canonical linear system is without base points…

Algebraic Geometry · Mathematics 2007-05-23 Weimin Chen

Consider a holomorphic map $F: D \to G$ between two domains in ${\mathbb C}^N$. Let $\mathcal F$ denote a family of geodesics for the Kobayashi distance, such that $F$ acts as an isometry on each element of $\mathcal F$. This paper is…

Complex Variables · Mathematics 2025-04-10 Filippo Bracci , Łukasz Kosiński , Włodzimierz Zwonek

We study the Hamiltonian path problem in C-shaped grid graphs, and present the necessary and sufficient conditions for the existence of a Hamiltonian path between two given vertices in these graphs. We also give a linear-time algorithm for…

Computational Complexity · Computer Science 2016-02-25 Fatemeh Keshavarz-Kohjerdi , Alireza Bagheri

Let X be a complex nonsingular affine algebraic variety, K a holomorphically convex subset of X, and Y a homogeneous variety for some complex linear algebraic group. We prove that a holomorphic map f:K-->Y can be uniformly approximated on K…

Complex Variables · Mathematics 2020-12-23 Jacek Bochnak , Wojciech Kucharz