Results 11 to 20 of about 4,676 (117)

ON DISTORTION OF THE MODULI OF RINGS UNDER LOCALLY QUASICONFORMAL MAPPINGS IN R^n

open access: yesПроблемы анализа, 2015
Some of the earlier results of author concerning distortion of the moduli of ring domains under planar locally quasiconformal mappings are generalized on the case of locally quasiconformal mappings in Rn, n ≥ 2.
S. Yu. Graf
doaj   +1 more source

An N-dimensional version of the Beurling-Ahlfors extension [PDF]

open access: yes, 2009
We extend monotone quasiconformal mappings from dimension n to n+1 while preserving both monotonicity and quasiconformality. The extension is given explicitly by an integral operator.
Kovalev, Leonid V., Onninen, Jani
core   +3 more sources

Counting and boundary limit theorems for representations of Gromov‐hyperbolic groups

open access: yesProceedings of the London Mathematical Society, Volume 127, Issue 3, Page 589-652, September 2023., 2023
Abstract Given a Gromov‐hyperbolic group G$G$ endowed with a finite symmetric generating set, we study the statistics of counting measures on the spheres of the associated Cayley graph under linear representations of G$G$. More generally, we obtain a weak law of large numbers for subadditive functions, echoing the classical Fekete lemma.
Stephen Cantrell, Cagri Sert
wiley   +1 more source

Ivan Pesin (to his 90th anniversary)

open access: yesМатематичні Студії, 2020
The note is devoted to biography and achievements of Ukrainian mathematician Ivan Pesin (1930--1993).
M. Zarichnyi   +3 more
doaj   +1 more source

On Quasi-inversions [PDF]

open access: yes, 2015
Given a bounded domain $D \subset {\mathbb R}^n$ strictly starlike with respect to $0 \in D\,,$ we define a quasi-inversion w.r.t. the boundary $\partial D \,.$ We show that the quasi-inversion is bi-Lipschitz w.r.t.
Kalaj, David   +2 more
core   +1 more source

An asymptotically sharp coefficients estimate for harmonic K-quasiconformal mappings

open access: yesJournal of Inequalities and Applications, 2016
By using the improved Hübner inequalities, in this paper we obtain an asymptotically sharp lower bound estimate for the coefficients of harmonic K-quasiconformal self-mappings of the unit disk D ${\mathbb{D}}$ which keep the origin fixed.
Hong-Ping Li
doaj   +1 more source

Quasiconformal mappings and curvatures on metric measure spaces

open access: yesPracì Mìžnarodnogo Geometričnogo Centru, 2023
In an attempt to develop higher-dimensional quasiconformal mappings on metric measure spaces with curvature conditions, i.e. from Ahlfors to Alexandrov, we show that for n≥2 a noncollapsed RCD(0,n) space with Euclidean volume growth is an n-Loewner space
Jialong Deng
doaj   +1 more source

Loewner theory for quasiconformal extensions: old and new [PDF]

open access: yes, 2019
This survey article gives an account of quasiconformal extensions of univalent functions with its motivational background from Teichm\"uller theory and classical and modern approaches based on Loewner theory.Comment: 25 pages, 3 figs.
Hotta, Ikkei
core   +3 more sources

Modulus of surface families and the radial stretch in the Heisenberg group [PDF]

open access: yes, 2015
We develop a modulus method for surface families inside a domain in the Heisenberg group and we prove that the stretch map between two Heisenberg spherical rings is a minimiser for the mean distortion among the class of contact quasiconformal maps ...
Platis, Ioannis D.
core   +1 more source

On the behaviour of derivative of algebraic polynomials in the regions with cusps

open access: yesApplied Mathematics in Science and Engineering, 2022
In this paper, we study the behavior of derivatives of algebraic polynomials in bounded and unbounded regions of the complex plane. At the same time, both interior and exterior cusp points are allowed on the boundary of such regions. Bernstein-Walsh-type
N. P. Özkartepe
doaj   +1 more source

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