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We prove an analogue of Alexander's Theorem for holomorphic mappings of the unit ball in a complex Hilbert space: Every holomorphic mapping which takes a piece of the boundary of the unit ball into the boundary of the unit ball and whose…

Complex Variables · Mathematics 2007-05-23 Bernhard Lamel

The aim of this work is to exhibit an example of an endomorphism of $\T^{2}$ which is $C^2$-robustly transitive but not $C^1$-robustly transitive.

Dynamical Systems · Mathematics 2016-06-23 Jorge Iglesia , Aldo Portela

In this note we prove that appropriately scaled threshold dynamics-type algorithms corresponding to the fractional Laplacian of order $\alpha \in (0,2)$ converge to moving fronts. When $\alpha \geqq 1$ the resulting interface moves by…

Analysis of PDEs · Mathematics 2009-11-13 Luis A. Caffarelli , Panagiotis E. Souganidis

Matchbox manifolds are foliated spaces with totally disconnected transversals. Two matchbox manifolds which are homeomorphic have return equivalent dynamics, so that invariants of return equivalence can be applied to distinguish…

Dynamical Systems · Mathematics 2019-03-13 Alex Clark , Steven Hurder , Olga Lukina

For a rank 1 local system on the complement of a reduced divisor on a complex manifold $X$, its cohomology is calculated by the twisted meromorphic de Rham complex. Assuming the divisor is everywhere positively weighted homogeneous, we…

Algebraic Geometry · Mathematics 2024-02-13 Daniel Bath , Morihiko Saito

We investigate the local deformation space of 3-dimensional cone-manifold structures of constant curvature $\kappa \in \{-1,0,1\}$ and cone-angles $\leq \pi$. Under this assumption on the cone-angles the singular locus will be a trivalent…

Differential Geometry · Mathematics 2011-11-10 Hartmut Weiss

The Pruning Front Conjecture is proved for an open set of H\'enon parameters far from unimodal. More specifically, for an open subset of H\'enon parameter space, consisting of two connected components one of which intersects the…

Dynamical Systems · Mathematics 2014-03-06 Valentín Mendoza

Locally triangular graphs are known to be halved graphs of bipartite rectagraphs, which are connected triangle-free graphs in which every $2$-arc lies in a unique quadrangle. A graph $\Gamma$ is locally rank 3 if there exists $G\leq…

Group Theory · Mathematics 2015-12-08 John Bamberg , Alice Devillers , Joanna B. Fawcett , Cheryl E. Praeger

We analyze the local convergence of proximal splitting algorithms to solve optimization problems that are convex besides a rank constraint. For this, we show conditions under which the proximal operator of a function involving the rank…

Optimization and Control · Mathematics 2018-11-12 Christian Grussler , Pontus Giselsson

In this paper, we present a simple yet effective padding scheme that can be used as a drop-in module for existing convolutional neural networks. We call it partial convolution based padding, with the intuition that the padded region can be…

Computer Vision and Pattern Recognition · Computer Science 2018-11-29 Guilin Liu , Kevin J. Shih , Ting-Chun Wang , Fitsum A. Reda , Karan Sapra , Zhiding Yu , Andrew Tao , Bryan Catanzaro

A smooth curve $\gamma: [0,1] \to S^2$ is locally convex if its geodesic curvature is positive at every point. J. A. Little showed that the space of all locally positive curves $\gamma$ with $\gamma(0) = \gamma(1) = e_1$ and $\gamma'(0) =…

Geometric Topology · Mathematics 2012-03-16 Nicolau C. Saldanha

We prove the following autoduality theorem for an integral projective curve C in any characteristic. Given an invertible sheaf L of degree 1, form the corresponding Abel map A_L: C->J, which maps C into its compactified Jacobian, and form…

Algebraic Geometry · Mathematics 2007-05-23 Eduardo Esteves , Mathieu Gagne , Steven Kleiman

A map is bi-orientable if it admits an assignment of local orientations to its vertices such that for every edge, the local orientations at its two endpoints are opposite. Such an assignment is called a bi-orientation of the map. A…

Group Theory · Mathematics 2025-09-17 Jiyong Chen , Zhaochen Ding , Cai Heng Li

The well-known Reifenberg theorem states that if a subset of $\mathbb{R}^n$ can be well approximated by $k$-planes at every point and every scale, then it is biH\"older homeomorphic to a $k$-disk. This article concerns a subset $S$ of…

Metric Geometry · Mathematics 2025-08-21 Jiaqi Zang

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

Some criteria for graded local cohomology to commute with coarsening functors are proven, and an example is given where graded local cohomology does not commute with coarsening.

Commutative Algebra · Mathematics 2014-04-03 Fred Rohrer

Let $R$ be a ring with involution containing a nontrivial symmetric idempotent element $e$. Let $\delta: R\rightarrow R$ be a mapping such that $\delta(ab)=\delta(b)a^{\ast}+b^{\ast}\delta(a)$ for all $a,b\in R$, we call $\delta$ a…

Rings and Algebras · Mathematics 2020-02-11 Gurninder S. Sandhu , Bruno L. M. Ferreira , D. Kumar

This paper presents a formalization of decreasing diagrams in the theorem prover Isabelle. It discusses mechanical proofs showing that any locally decreasing abstract rewrite system is confluent. The valley and the conversion version of…

Logic in Computer Science · Computer Science 2013-04-12 Harald Zankl

We study the topological dynamics of H\'enon maps. For a parameter set generalizing the Benedicks-Carleson parameters (the Wang-Young parameter set) we obtain the following: The pruning front conjecture (due to Cvitanovi\'c); A kneading…

Dynamical Systems · Mathematics 2024-12-16 Jan P. Boroński , Sonja Štimac

This paper continues the study of link spectral invariants on compact surfaces, introduced in our previous work and shown to satisfy a Weyl law in which they asymptotically recover the Calabi invariant. Here we study their subleading…

Symplectic Geometry · Mathematics 2025-01-22 Dan Cristofaro-Gardiner , Vincent Humilière , Cheuk Yu Mak , Sobhan Seyfaddini , Ivan Smith