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Let $\Omega$ be the multiply connected domain in the extended complex plane $\overline{\C}$ obtained by removing $m$ non-overlapping rectilinear segments from the infinite strip $S=\{z\,:\, \left|\Im z\right|<\pi/2\}$. In this paper, we…

Complex Variables · Mathematics 2022-12-05 El Mostafa Kalmoun , Mohamed M. S. Nasser , Matti Vuorinen

We study conformal mappings from the unit disk to one-toothed gear-shaped planar domains from the point of view of the Schwarzian derivative. Gear-shaped (or "gearlike") domains fit into a more general category of domains we call "pregears"…

Complex Variables · Mathematics 2024-10-15 Philip R. Brown , R. Michael Porter

For arbitrary planar convex domain, we compute the behavior of Christoffel function up to a constant factor using comparison with other simple reference domains. The lower bound is obtained by constructing an appropriate ellipse contained…

Classical Analysis and ODEs · Mathematics 2021-06-16 A. Prymak

The conformal mapping problem for the section of a channel filled with porous material under a rectangular dam onto the upper half-plane is considered. Similar problems arise in computing of fluid flow in hydraulic structures. As a solution…

Complex Variables · Mathematics 2022-06-22 Matvey Smirnov

Consider the straightening phi of a Beltrami form that is constant on a square, with the corresponding ellipses having a vertical major axis, and null outside. A generalized Schwarz-Christoffel formula is used to express the inverse of phi.…

Complex Variables · Mathematics 2008-11-18 Arnaud Chéritat

Jacobi's elliptic integrals and elliptic functions arise naturally from the Schwarz-Christoffel conformal transformation of the upper half plane onto a rectangle. In this paper we study generalized elliptic integrals which arise from the…

Classical Analysis and ODEs · Mathematics 2007-08-08 Ville Heikkala , Mavina K. Vamanamurthy , Matti Vuorinen

We show that the computational complexity of Riemann mappings can be bounded by the complexity needed to compute conformal mappings locally at boundary points. As a consequence we get first formally proven upper bounds for…

Computational Complexity · Computer Science 2010-06-03 Robert Rettinger

Numerical and theoretical aspects of conformal mappings from a disk to a circular-arc quadrilateral, symmetric with respect to the coordinate axes, are developed. The problem of relating the accessory parameters (prevertices together with…

Complex Variables · Mathematics 2024-10-08 Philip R. Brown , R. Michael Porter

We study conformal mappings from the unit disk (or a rectangle) to one-tooth gear-shaped planar domains from the point of view of the Schwarzian derivative, with emphasis on numerical considerations. Applications are given to evaluation of…

Complex Variables · Mathematics 2024-10-15 Philip R. Brown , R. Michael Porter

We extend previous work on Schwarz-Chrsitoffel mappings, including the special cases when the image is a convex polygon or its complement. We center our analysis on the relationship between the pre-Schwrazian of such mappings and Blaschke…

Complex Variables · Mathematics 2014-05-26 Martin Chuaqui , Christian Pommerenke

Among various methods of finding accessory parameters in the Schwarz-Christoffel integrals, Kufarev's method, based on the Loewner differential equation, plays an important role. It is used for describing one-parameter families of functions…

Complex Variables · Mathematics 2023-02-10 A. Posadskii , S. Nasyrov

We study conformal maps from multiply connected domains in the extended complex plane onto lemniscatic domains. Walsh proved the existence of such maps in 1956 and thus obtained a direct generalization of the Riemann mapping theorem to…

Complex Variables · Mathematics 2016-04-27 Olivier Sète , Jörg Liesen

A nonlinear inverse problem of antiplane elasticity for a multiply connected domain is examined. It is required to determine the profile of $n$ uniformly stressed inclusions when the surrounding infinite body is subjected to antiplane…

Complex Variables · Mathematics 2018-10-01 Y. A. Antipov

La transformoj de Schwarz-Christoffel mapas, konforme, la superan kompleksan duon-ebenon al regiono limigita per rektaj segmentoj. Cxi tie ni priskribas kiel konvene kunigi mapon de la suba duon-ebeno al mapo de la supera duon-ebeno. Ni…

Complex Variables · Mathematics 2017-05-15 F. M. Paiva , A. F. F. Teixeira

We prove a general lower bound on Christoffel function on planar convex domains in terms of a modification of the parallel section function of the domain. For a certain class of planar convex domains, in combination with a recent general…

Classical Analysis and ODEs · Mathematics 2017-10-02 A. Prymak , O. Usoltseva

This paper presents a MATLAB toolbox for computing the conformal mapping from a given polygonal multiply connected domain onto a circular multiply connected domain and its inverse. The toolbox can be used for multiply connected domains with…

Complex Variables · Mathematics 2020-02-19 Mohamed M. S. Nasser

We investigate the application of the additive overlapping Schwarz domain decomposition method as a preconditioner for the large sparse linear systems arising in graph-based nonlinear least-squares problems, specifically the pose-graph…

Numerical Analysis · Mathematics 2026-03-11 Stephan Köhler , Oliver Rheinbach , Yue Xiang Tee , Sebastian Zug

We compute up to a constant factor the Christoffel function on planar domains with boundary consisting of finitely many $C^2$ curves such that each corner point of the boundary has interior angle strictly between $0$ and $\pi$. The…

Classical Analysis and ODEs · Mathematics 2019-02-19 A. Prymak , O. Usoltseva

In the current work we present a spectral analysis of the additive and multiplicative Schwarz methods within the framework of domain decomposition techniques, by investigating the spectral properties of these classical Schwarz…

Numerical Analysis · Mathematics 2026-02-05 Abdessadek Rifqui , Ahmed Ratnani , Stefano Serra-Capizzano

The classical Green's function associated to a simply connected domain in the complex plane is easily expressed in terms of a Riemann mapping function. The purpose of this paper is to express the Green's function of a finitely connected…

Complex Variables · Mathematics 2009-09-29 Steven R. Bell
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