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We present a number of rigidity results concerning holomorphic dynamical systems admitting rotation quasicircles. Firstly, we show the absence of line fields on the Julia set of any rational map that is geometrically finite away from a…

Dynamical Systems · Mathematics 2025-09-05 Willie Rush Lim

We introduce the natural notion of (p,q)-harmonic morphisms between Riemannian manifolds. This unifies several theories that have been studied during the last decades. We then study the special case when the maps involved are…

Differential Geometry · Mathematics 2021-04-05 Elsa Ghandour , Sigmundur Gudmundsson

The purpose of this paper is to initiate a theory concerning the dynamics of asymptotically holomorphic polynomial-like maps. Our maps arise naturally as deep renormalizations of asymptotically holomorphic extensions of $C^r$ ($r>3$)…

Dynamical Systems · Mathematics 2018-04-18 Trevor Clark , Edson de Faria , Sebastian van Strien

We prove a couple of results on local continuous extension of proper holomorphic maps $F:D \rightarrow \Omega$, $D, \Omega \varsubsetneq \mathbb{C}^n$, making local assumptions on $\partial{D}$ and $\partial{\Omega}$. The first result…

Complex Variables · Mathematics 2024-04-25 Annapurna Banik

In a previous paper we built a modified Hamiltonian formalism to make possible explicit maps among manifolds. In this paper the modified formalism was generalized. As an application, we have built maps among spaces associated to spinors, as…

Mathematical Physics · Physics 2008-03-10 A. C. V. V. de Siqueira

I use local differential geometric techniques to prove that the algebraic cycles in certain extremal homology classes in Hermitian symmetric spaces are either rigid (i.e., deformable only by ambient motions) or quasi-rigid (roughly…

Differential Geometry · Mathematics 2007-05-23 Robert L. Bryant

We prove two results on geometric consequences of the representation of restricted holonomy group of a Hermitian connection. The first result concerns when such a Hermitian manifold is K\"ahler in terms of the torsion and the irreducibility…

Differential Geometry · Mathematics 2024-10-10 Lei Ni

In this paper, we prove an existence theorem of a local moduli space for geometric structures in a very general setting. Then to show the interest of this result, we apply it to the case of sasakian and Sasaki-Einstein structures.

Differential Geometry · Mathematics 2015-10-19 Laurent Meersseman , Marcel Nicolau

We describe the relation of $r$-similarity and finite-order invariants on the homotopy set $[S^1,Y]=\pi_1(Y)$.

Algebraic Topology · Mathematics 2026-02-16 S. S. Podkorytov

In this work, we study a gap phenomenon in locally conformally flat Riemannian manifolds with non-negative Ricci curvature. We construct complete solutions to the Yamabe flow that exhibit instantaneous bounded curvature as they evolve.…

Differential Geometry · Mathematics 2025-04-14 Ming Hsiao , Man-Chun Lee

We introduce a new map between configuration spaces of points in a background manifold - the replication map - and prove that it is a homology isomorphism in a range with certain coefficients. This is particularly of interest when the…

Algebraic Topology · Mathematics 2015-09-21 Federico Cantero , Martin Palmer

In this article, we summarize the results on symmetric conformal geometries. We review the results following from the general theory of symmetric parabolic geometries and prove several new results for symmetric conformal geometries. In…

Differential Geometry · Mathematics 2016-02-08 Jan Gregorovič , Lenka Zalabová

We show that the structure of proper holomorphic maps between the $n$-fold symmetric products, $n\geq 2$, of a pair of non-compact Riemann surfaces $X$ and $Y$, provided these are reasonably nice, is very rigid. Specifically, any such map…

Complex Variables · Mathematics 2018-11-05 Gautam Bharali , Indranil Biswas , Divakaran Divakaran , Jaikrishnan Janardhanan

Let $M$ be a closed manifold. Polterovich constructed a linear map from the vector space of quasi-morphisms on the fundamental group $\pi _{1}(M)$ of $M$ to the space of quasi-morphisms on the identity component ${\rm…

Geometric Topology · Mathematics 2014-08-13 Tomohiko Ishida

In this work, we extend the concepts of $p$-biharmonic maps and $p$-biharmonic hypersurfaces to provide a broader characterization of $(p,q)$-harmonic hypersurfaces and $(p,q)$-harmonic curves in Riemannian manifolds, including Einstein…

Differential Geometry · Mathematics 2026-03-26 Moustafa Tadj , Ahmed Mohammed Cherif , Fethi Latti

We develop the deformation theory of hyperbolic cone-3-manifolds with cone-angles less than $2\pi$, i.e. contained in the interval $(0,2\pi)$. In the present paper we focus on deformations keeping the topological type of the cone-manifold…

Differential Geometry · Mathematics 2013-03-13 Hartmut Weiss

Motivated by a question of Tsai-Tsui-Wang, we consider the rigidity of map from manifolds with positive Ricci curvature to manifolds with positive sectional curvature. We show that if the Ricci curvature of the domain dominates that of the…

Differential Geometry · Mathematics 2024-11-25 Man-Chun Lee , Jingbo Wan

For a surface $S$ of sufficient complexity, Dehn twists act elliptically on the arc, curve, and relative arc graph of $S$. We show that composing a Dehn twist with a shift map results in a loxodromic isometry of the relative arc graph…

Geometric Topology · Mathematics 2022-12-20 Carolyn Abbott , Nicholas Miller , Priyam Patel

We consider positivity conditions both for real-valued functions of several complex variables and for Hermitian forms. We prove a stabilization theorem relating these two notions, and give some applications to proper mappings between balls…

Complex Variables · Mathematics 2008-02-03 David W. Catlin , John P. D'Angelo

In this paper, we establish a new criterion for covering maps between real algebraic varieties. Specifically, we prove that a quasi-finite, flat morphism with locally constant geometric fibers between varieties over a real closed field…

Algebraic Geometry · Mathematics 2026-03-10 Rizeng Chen