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We study AAK-type meromorphic approximants to functions $F$, where $F$ is a sum of a rational function $R$ and a Cauchy transform of a complex measure $\lambda$ with compact regular support included in $(-1,1)$, whose argument has bounded…

Classical Analysis and ODEs · Mathematics 2015-05-13 Laurent Baratchart , Maxim Yattselev

The divergent integral $\int_a^b f(x)(x-x_0)^{-n-1}\mathrm{d}x$, for $-\infty<a<x_0<b<\infty$ and $n=0, 1, 2, \dots$, is assigned, under certain conditions, the value equal to the simple average of the contour integrals $\int_{C^{\pm}}…

Mathematical Physics · Physics 2016-05-03 Eric A. Galapon

A univalent meromorphic function defined on $\Delta:= \{z \in \mathbb{C}: 1<|z|<\infty \}$ with univalent inverse defined on $\Delta$ is bi-univalent meromorphic in $\Delta$. For certain subclasses of meromorphic bi-univalent functions,…

Complex Variables · Mathematics 2011-08-23 Suzeini Abd Halim , Samaneh G. Hamidi , V. Ravichandran

We give several unequivalent notions of convergency of meromorphic functions and more generally meromorphic mappings (strong, weak, $\Gamma $-convergency and some others). Relations between them are investigated. A version of Rouche theorem…

Complex Variables · Mathematics 2016-09-07 Sergei Ivashkovich

Let $\mathcal{F}$ be a foliation defined on a complex projective manifold $M$ of dimension $n$ and admitting a holomorphic vector field $X$ tangent to it along some non-empty Zariski-open set. In this paper we prove that if $X$ has…

Dynamical Systems · Mathematics 2023-09-08 Julio C. Rebelo , Helena Reis

In the main part of the paper, on the basis of contour integration of complex meromorphic functions whose singularities lie onto an integration contour, in the first step, a concept of improper integrals absolute existence of meromorphic…

Classical Analysis and ODEs · Mathematics 2007-05-23 Branko Saric

In this paper, we study the uniqueness of the differential-difference of meromorphic functions. We prove the following result: Let $f$ be a nonconstant meromorphic function of $\rho_{2}(f)<1$, let $\eta$ be a non-zero complex number,…

Complex Variables · Mathematics 2022-04-17 XiaoHuang Huang

A two-parameter characteristic of functions meromorphic on annuli is introduced and an extension of the Nevanlinna value distribution theory for such functions is proposed.

Complex Variables · Mathematics 2008-07-09 Andriy Kondratyuk

We give an upper bound for the number of functionally independent meromorphic first integrals that a discrete dynamical system generated by an analytic map $f$ can have in a neighborhood of one of its fixed points. This bound is obtained in…

Dynamical Systems · Mathematics 2020-12-07 Antoni Ferragut , Armengol Gasull , Xiang Zhang

In this article we consider functions $f$ meromorphic in the unit disk. We give an elementary proof for a condition that is sufficient for the univalence of such functions. This condition simplifies and generalizes known conditions. We…

Complex Variables · Mathematics 2017-04-27 Saminathan Ponnusamy , Karl-Joachim Wirths

n this article we consider functions meromorphic in the unit disk. We give an elementary proof for a condition that is sufficient for the univalence of such functions which also contains some known results. We include few open problems for…

Complex Variables · Mathematics 2019-05-07 See Keong Lee , Saminathan Ponnusamy , Karl-Joachim Wirths

We characterize the region of meromorphic continuation of an analytic function $f$ in terms of the geometric rate of convergence on a compact set of sequences of multi-point rational interpolants of $f$. The rational approximants have a…

Classical Analysis and ODEs · Mathematics 2012-11-26 Manuel Bello Hernández , Bernardo de la Calle Ysern

In this text we prove that if X is a reduced non-archimedean analytic space and f is a analytic function on a dense Zariski-open subspace of X whose zero-locus is closed in X, then f is a meromorphic function on X. As a corollary, we deduce…

Algebraic Geometry · Mathematics 2025-07-11 Antoine Ducros

The purpose of this paper has twofold. The first is to establish a second main theorem for meromorphic functions on annuli and meromorphic function targets (may not be small functions) with truncated counting functions (truncation level 1)…

Complex Variables · Mathematics 2023-06-27 Si Duc Quang

We are concerned with the Cauchy problem for the KdV equation for nonsmooth locally integrable initial profiles q's which are, in a certain sense, essentially bounded from below and q(x)=O(e^{-cx^{{\epsilon}}}),x\rightarrow+\infty, with…

Exactly Solvable and Integrable Systems · Physics 2011-09-29 Alexei Rybkin

We consider uniqueness results for meromorphic functions $f:{\mathbb C} \to \widehat{\mathbb C}$ such that for certain values $a\in {\mathbb C}$ the implication $f(z)=a \Rightarrow f'(z)=a$ holds, i.e. that $f$ and $f'$ share values {\it…

Complex Variables · Mathematics 2026-04-08 Andreas Sauer , Andreas Schweizer

The minimal possible rate of growth of a meromorphic function with three critical values is found.

Complex Variables · Mathematics 2008-08-08 Alexandre Eremenko

In this paper, we give a simple proof and strengthening of a uniqueness theorem of meromorphic functions which partially share 0, $\infty$ CM and 1 IM with their difference operators. Meanwhile, we partial solve a conjecture given by…

Complex Variables · Mathematics 2021-01-05 Feng Lü , Zhenliu Yang

It is known that local zeta functions associated with real analytic functions can be analytically continued as meromorphic functions to the whole complex plane. But, in the case of general ($C^{\infty}$) smooth functions, the meromorphic…

Classical Analysis and ODEs · Mathematics 2022-06-22 Joe Kamimoto , Toshihiro Nose

In the work, we focus on a conjecture due to Z.X. Chen and H.X. Yi[1] which is concerning the uniqueness problem of meromorphic functions share three distinct values with their difference operators. We prove that the conjecture is right for…

Complex Variables · Mathematics 2015-04-14 Feng Lü , Weiran Lü
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