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Related papers: The Schwarz lemma at the boundary

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The aim of this article is to give an elementary proof of the fact that the Schwarz-Pick Lemma follows from the Ahlfors-Schwarz-Pick Lemma.

Complex Variables · Mathematics 2025-12-23 Rafael Benjumea Cejas , Juan Carlos García Vázquez

We prove a Schwarz-type lemma for noncompact manifolds with possibly noncompact boundary. The result is a consequence of a suitable form of the weak maximum principle of independent interest. The paper is enriched with applications to…

Differential Geometry · Mathematics 2016-02-11 Guglielmo Albanese , Marco Rigoli

The celebrated Schwarz-Pick lemma for the complex unit disk is the basis for the study of hyperbolic geometry in one and in several complex variables. In the present paper, we turn our attention to the quaternionic unit ball B. We prove a…

Complex Variables · Mathematics 2013-02-12 Cinzia Bisi , Caterina Stoppato

We prove a high order Schwarz-Pick lemma for mappings between unit balls in complex spaces in terms of the Bergman metric. From this lemma, Schwarz-Pick estimates for partial derivatives of arbitrary order of mappings are deduced.

Complex Variables · Mathematics 2011-09-14 Shaoyu Dai , Huaihui Chen , Yifei Pan

In this paper, we establish a boundary Schwarz lemma for solutions to non-homogeneous biharmonic equations.

Complex Variables · Mathematics 2019-06-20 Manas Ranjan Mohapatra , Xiantao Wang , Jian-Feng Zhu

In this paper we prove a Schwarz-Pick lemma for the modulus of holomorphic mappings from the polydisk into the unit ball. This result extends some related results.

Complex Variables · Mathematics 2013-08-01 Shaoyu Dai , Yifei Pan

In this article, we characterize the holomorphic mappings from $B_{\ell_p^n}\times\mathbb{D}^{m}$ into $\mathbb{D}^{m}$ for $p\in \{2,\infty\}$. In addition, we give a simple proof for the boundary Schwarz lemma for vector valued…

Complex Variables · Mathematics 2026-05-20 Shankey Kumar , Saminathan Ponnusamy

We consider the behaviour of holomorphic functions on a bounded open subset of the plane, satisfying a Lipschitz condition with exponent $\alpha$, with $0<\alpha<1$, in the vicinity of an exceptional boundary point where all such functions…

Complex Variables · Mathematics 2015-09-29 Anthony G. O'Farrell

A Schwarz function on an open domain $\Omega$ is a holomorphic function satisfying $S(\zeta)=\overline{\zeta}$ on $\Gamma$, which is part of the boundary of $\Omega$. Sakai in 1991 gave a complete characterization of the boundary of a…

Complex Variables · Mathematics 2022-10-04 Dimitris Vardakis , Alexander Volberg

The Schwarz lemmas are well-known characterizations for holomorphic maps and we exhibit two examples of their applications. For a sequence family of biholomorphisms $f_j$, it is useful to determine the location of $f_j(q)$ for a fixed point…

Complex Variables · Mathematics 2015-01-15 Bingyuan Liu

Slice regular functions have been extensively studied over the past decade, but much less is known about their boundary behavior. In this paper, we initiate the study of Julia theory for slice regular functions. More specifically, we…

Complex Variables · Mathematics 2016-03-22 Guangbin Ren , Xieping Wang

In this paper we prove a Schwarz-Pick lemma for bounded complex-valued harmonic functions in the unit ball of R^n.

Complex Variables · Mathematics 2013-03-14 Dai Shaoyu , Pan Yifei

The main purpose of this paper is to establish a Schwarz lemma for the solutions to the Dirichlet problems for the invariant Laplacians. The obtained result of this paper is a generalization of the corresponding known results [11, Theorem…

Complex Variables · Mathematics 2023-12-15 Qianyun Li , Jiaolong Chen

We survey a number of recent generalizations and sharpenings of Nehari's extension of Schwarz' lemma for holomorphic self-maps of the unit disk. In particular, we discuss the case of infinitely many critical points and its relation to the…

Complex Variables · Mathematics 2022-06-10 Oliver Roth

The Schwarz--Pick lemma is a fundamental result in complex analysis. It is well-known that Yau generalized it to the higher dimensional manifolds by applying his maximum principle for complete Riemannian manifolds. Jeffres obtained Schwarz…

Differential Geometry · Mathematics 2016-10-07 Ryosuke Nomura

We present a new Schwarz Lemma for bounded domains with Bergman metrics. The key ingredient of our proof is the Cauchy-Schwarz inequality from probability theory.

Complex Variables · Mathematics 2026-01-01 Hoseob Seo , Sungmin Yoo , Jihun Yum

We describe all complex geodesics in the tetrablock passing through the origin thus obtaining the form of all extremals in the Schwarz Lemma for the tetrablock. Some other extremals for the Lempert function and geodesics are also given. The…

Complex Variables · Mathematics 2014-02-26 A. Edigarian , W. Zwonek

In this paper we prove a Schwarz-Pick lemma for the modulus of holomorphic mappings between the unit balls in complex spaces. This extends the classical Schwarz-Pick lemma and the related result proved by Pavlovic.

Complex Variables · Mathematics 2013-07-31 Shaoyu Dai , Yifei Pan

We prove a sharp version of the Hopf boundary point lemma for Black-Scholes type equations. We also investigate the existence and the regularity of the spatial derivative of the solutions at the spatial boundary.

Analysis of PDEs · Mathematics 2008-12-02 Erik Ekström , Johan Tysk

We prove a ``general shrinking lemma'' that resembles the Schwarz--Pick--Ahlfors Lemma and its many generalizations, but differs in applying to maps of a finite disk into a disk, rather than requiring the domain of the map to be complete.…

Complex Variables · Mathematics 2016-09-07 Robert Osserman