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Given a manifold M, it is natural to ask in how many ways it fibers (we mean fibering in a general way, where the base might be an orbifold -- this could be described as Seifert fibering)There are group-theoretic obstructions to the…

几何拓扑 · 数学 2011-07-05 Igor Rivin

This article provides several theorems regarding the existence of limit for multivariable function, among which Theorem 1 and Theorem 3 relax the requirement for sequence of Heine's definition of limit. These results address the question of…

综合数学 · 数学 2024-10-08 Ming Yang

We introduce an individual-based model for fiber elements having the ability to cross-link or unlink each other and to align with each other at the cross links. We first formally derive a kinetic model for the fiber and cross-links…

数学物理 · 物理学 2015-05-20 Pierre Degond , Fanny Delebecque , Diane Peurichard

This paper examines the existence and region of convergence of Fourier transform of the functions of bicomplex variables with the help of projection on its idempotent components as auxiliary complex planes. Several basic properties of this…

复变函数 · 数学 2015-10-20 Abhijit Banerjee , Sanjib Kumar Datta , Md Azizul Hoque

We study constructions of contact forms on closed manifolds. A notion of strong symplectic fold structure is defined and we prove that there is a contact form on $M \x X$ provided that $M$ admits such a structure and $X$ is contact. This…

辛几何 · 数学 2013-08-13 Bogusław Hajduk , Rafał Walczak

Necessary and sufficient conditions for Lipschitzness of the Lempert and Green functions are found in terms of their boundary behaviors.

复变函数 · 数学 2010-06-23 Nikolai Nikolov , Peter Pflug , Pascal J. Thomas

Given a null-cobordant oriented framed link $L$ in a closed oriented $3$--manifold $M$, we determine those links in $M \setminus L$ which can be realized as the singular point set of a generic map $M \to \mathbb{R}^2$ that has $L$ as an…

几何拓扑 · 数学 2018-04-03 Osamu Saeki

We prove that if a continuous piecewise-smooth map on $\mathbb{R}^n$ is comprised of two linear functions, has a bounded orbit, and satisfies a certain non-degeneracy condition, then it has a fixed point. The result has important…

动力系统 · 数学 2024-12-17 David J. W. Simpson

We study a superlinear and subcritical Kirchhoff type equation which is variational and depends upon a real parameter $\lambda$. The nonlocal term forces some of the fiber maps associated with the energy functional to have two critical…

偏微分方程分析 · 数学 2019-06-12 Kaye Silva

For a large class of metric spaces with nice local structure, which includes Banach-Finsler manifolds and geodesic spaces of curvature bounded above, we give sufficient conditions for a local homeomorphism to be a covering projection. We…

度量几何 · 数学 2007-05-23 Olivia Gutu , Jesus A. Jaramillo

In this paper, we firstly give the definition of meromorphic function element and algebroid mapping. We also construct the algebroid function family in which the arithmetic, differential operations is closed. On basis of these works, we…

复变函数 · 数学 2009-12-15 Daochun Sun , Zongsheng Gao , Huifang Liu

We give a sufficient condition for a meromorphic correspondence to be a holomorphic correspondence in a neighbourhood of a smooth real hypersurface

复变函数 · 数学 2013-11-14 Rasul Shafikov , Kaushal Verma

This paper is an introduction to the theory of multivector functions of a real variable. The notions of limit, continuity and derivative for these objects are given. The theory of multivector functions of a real variable, even being similar…

综合数学 · 数学 2016-08-16 A. M. Moya , V. V. Fernández , W. A. Rodrigues

Suppose that a function $F$ is meromorphic in the domain $\mathbb H(-m) = \{ z : \mathrm{Im}\, z > -m(\mathrm{Re}\, z) \}$, where $m$ is an even, positive, and continuous function that does not increase on $\mathbb R_{\ge 0}$, and suppose…

复变函数 · 数学 2026-04-08 Alexandre Eremenko , Aleksei Kulikov , Mikhail Sodin

Fibered holomorphic dynamics are skew-product transformations over an irrational rotation, whose fibers are holomorphic functions. In this paper we study such a dynamics on a neighborhood of an invariant curve. We obtain some results…

动力系统 · 数学 2011-11-07 M. Ponce

The growth of meromorphic solutions of linear difference equations containing Askey-Wilson divided difference operators is estimated. The $\varphi$-order is used as a general growth indicator, which covers the growth spectrum between the…

复变函数 · 数学 2021-01-29 Hui Yu , Janne Heittokangas , Jun Wang , Zhi-Tao Wen

We consider integrals over vanishing cycles in the Milnor fibration of an isolated singularity defined by a Newton non-degenerate function. We single out a condition where the leading logarithmic term of the expansion of the integral into a…

代数几何 · 数学 2026-02-09 Achim Hennings

This article tackles the problem of the classification of expansive homeomorphisms of the plane. Necessary and sufficient conditions for a homeomorphism to be conjugate to a linear hyperbolic automorphism will be presented. The techniques…

动力系统 · 数学 2010-10-19 Jorge Groisman

The aim of the present article is to establish the connection between the existence of the limit along the normal and an admissible limit at a fixed boundary point for holomorphic functions of several complex variables.

复变函数 · 数学 2012-07-06 P. V. Dovbush

We give a local criterion in terms of a residue current for strong holomorphicity of a meromorphic function on an arbitrary pure-dimensional analytic variety. This generalizes a result by A Tsikh for the case of a reduced complete…

复变函数 · 数学 2009-03-31 Mats Andersson
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