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We look at degenerating meromorphic families of rational maps on $\mathbb{P}^1$ -- holomorphically parameterized by a punctured disk -- and we provide examples where the bifurcation current fails to have a bounded potential in a…

Dynamical Systems · Mathematics 2018-02-12 Laura DeMarco , Yûsuke Okuyama

Let D be the open unit disc in C. The paper deals with the following conjecture: If f is a continuous function on bD such that the change of argument of Pf+1 around bD is nonnegative for every polynomial P such that Pf+1 has no zero on bD…

Complex Variables · Mathematics 2012-02-09 Josip Globevnik

Let U be the open unit disc in C. Given a continuous function g: bU --> C-{0} denote by W(g) the winding number of g around the origin. We prove that a continuous function f: bU --> C extends meromorphically through U if and only if there…

Complex Variables · Mathematics 2007-05-23 Josip Globevnik

Let $1\leq m\leq n$ be two fixed integers. Let $\Omega \Subset \mathbb C^n$ be a bounded $m$-hyperconvex domain and $\mathcal A \subset \Omega \times ]0,+ \infty[$ a finite set of weighted poles. We define and study properties of the…

Complex Variables · Mathematics 2023-02-08 Hadhami Elaini , Ahmed Zeriahi

For an analytic family $\{f_t\}_{t\in\mathbb{D}^*}$ on the unit punctured disk that meromorphically degenerates at the origin, we show that its limiting measure on an snc model is given by the push forward of the canonical measure attached…

Dynamical Systems · Mathematics 2025-02-10 Reimi Irokawa

The Green function of the spectral ball is constant over the isospectral varieties, is never less than the pullback of its counterpart on the symmetrized polydisk, and is equal to it in the generic case where the pole is a cyclic…

Complex Variables · Mathematics 2011-11-17 Pascal J. Thomas , Nguyen Van Trao , Wlodzimierz Zwonek

This paper is devoted to the uniqueness problem of the power of a meromorphic function with its differential polynomial sharing a set. Our result will extend a number of results obtained in the theory of normal families. Some questions are…

Complex Variables · Mathematics 2022-09-15 Abhijit Banerjee , Bikash Chakraborty

We show that unary log-analytic functions are polynomially bounded. In the higher dimensional case globally a log-analytic function can have exponential growth. We show that a log-analytic function is polynomially bounded on a definable set…

Logic · Mathematics 2023-06-27 Tobias Kaiser

We prove that polycyclic groups are of polynomial growth or of uniform exponential growth.

Group Theory · Mathematics 2007-05-23 Roger C. Alperin

We consider polynomials orthogonal on the unit circle with respect to the complex-valued measure $z^{\omega-1}\mathrm{d} z$, where $\omega\in\mathbb{R}\setminus\{0\}$. We derive their explicit form, a generating function and several…

Complex Variables · Mathematics 2023-08-14 María José Cantero , Arieh Iserles

In the present paper we establish sharp pointwise estimates on the polyharmonic Green function and its derivatives in an arbitrary bounded open set.

Analysis of PDEs · Mathematics 2009-03-06 Svitlana Mayboroda , Vladimir Maz'ya

For meromorphic maps of complex manifolds, ergodic theory and pluripotential theory are closely related. In nice enough situations, dynamically defined Green's functions give rise to invariant currents which intersect to yield measures of…

Complex Variables · Mathematics 2008-03-06 Jeffrey Diller , Vincent Guedj

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 have established various criteria for the topological transitivity of families of continuous (holomorphic) functions. Furthermore, by leveraging the properties of expanding families of meromorphic functions, we offer an alternative proof…

Complex Variables · Mathematics 2025-06-12 Anil Singh , Banarsi Lal

Let B be the open unit ball in C^2 and let a, b, c be three points in C^2 which do not lie in a complex line, such that the complex line through a and b meets B and such that <a|b> is different from 1 if one of the points a, b is in B and…

Complex Variables · Mathematics 2011-01-19 Josip Globevnik

We construct the Green current for a random iteration of "horizontal-like" mappings in two complex dimensions. This is applied to the study of a polynomial map $f:\mathbb{C}^2\to\mathbb{C}^2$ with the following properties: 1. infinity is…

Dynamical Systems · Mathematics 2007-05-23 Tien-Cuong Dinh , Romain Dujardin , Nessim Sibony

We consider the problem of extending germs of plane holomorphic foliations to foliations of compact surfaces. We show that the germs that become regular after a single blow up and admit meromorphic first integrals can be extended, after…

Complex Variables · Mathematics 2014-07-31 Gabriel Calsamiglia , Paulo Sad

We establish a local Harnack inequality in a neighborhood of an indecomposable singular point of a stationary integral varifold. Extending the method of Gr\"uter and Widman \cite{gruter1982green}, we construct the Green function on a…

Differential Geometry · Mathematics 2026-03-18 Yifan Guo

We study ultrametric germs in one variable having an irrationally indifferent fixed point at the origin with a prescribed multiplier. We show that for many values of the multiplier, the cycles in the unit disk of the corresponding monic…

Dynamical Systems · Mathematics 2019-02-20 Karl-Olof Lindahl , Juan Rivera-Letelier

We study the limits of pluricomplex Green functions with four poles tending to the origin in a hyperconvex domain, and the (related) limits of the ideals of holomorphic functions vanishing on those points. Taking subsequences, we always…

Complex Variables · Mathematics 2017-10-24 Duong Quang Hai , Pascal J. Thomas
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