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This article surveys recent results aiming at obtaining refined mapping estimates for the X-ray transform on a Riemannian manifold with boundary, which leverage the condition that the boundary be strictly geodesically convex. These…

Analysis of PDEs · Mathematics 2023-09-04 François Monard

We prove that every endomorphism which satisfies Axiom A and the strong transversality conditions is $C^1$-inverse limit structurally stable. These conditions were conjectured to be necessary and sufficient. This result is applied to the…

Dynamical Systems · Mathematics 2013-07-01 Pierre Berger , Alejandro Kocsard

In this paper, we develop the infinitesimal geometry of the limit spaces of compact Riemannian manifolds with boundary, where we assume lower bounds on the sectional curvatures of manifolds and boundaries and the second fundamental forms of…

Differential Geometry · Mathematics 2026-04-14 Takao Yamaguchi , Zhilang Zhang

In the present paper, homeomorphisms in metric spaces which generalize quasiconformal mappings, are investigated. It is proved that, at some conditions on metric spaces and boundaries of corresponding domains, families of above mappings are…

Metric Geometry · Mathematics 2017-10-10 Evgeny Sevost'yanov

For any finite point set in $D$-dimensional space equipped with the 1-norm, we present random linear embeddings to $k$-dimensional space, with a new metric, having the following properties. For any pair of points from the point set that are…

Probability · Mathematics 2020-11-09 Michael P. Casey

A Q-manifold is a supermanifold equipped with an odd vector field that squares to zero. The notion of the modular class of a Q-manifold -- which is viewed as the obstruction to the existence of a Q-invariant Berezin volume -- is not well…

Differential Geometry · Mathematics 2018-01-12 Andrew James Bruce

We present a one-to-one correspondence between equivalence classes of embeddings of a manifold (into a larger manifold of the same dimension) and equivalence classes of certain distances on the manifold. This correspondence allows us to use…

General Relativity and Quantum Cosmology · Physics 2011-04-19 Ben E. Whale , Susan M. Scott

In this paper, we construct various examples of holomorphic laminations, with leaves of dimension 1, and we also study some of their dynamical properties. In particular we study existence and uniqueness of positive closed currents. We…

Dynamical Systems · Mathematics 2010-02-16 John Erik Fornaess , Nessim Sibony , Erlend Fornaess Wold

In this paper, we consider inverse limits of [0,1] using upper semicontinuous set-valued bonding functions with the intermediate value property. Expanding on classical results by Barge and Martin, we explore the relationship between…

Dynamical Systems · Mathematics 2021-08-12 Tavish J. Dunn , David J. Ryden

We show that the sequence of dimensions of the linear spaces, generated by a given rank-metric code together with itself under several applications of a field automorphism, is an invariant for the whole equivalence class of the code. The…

Information Theory · Computer Science 2020-09-17 Alessandro Neri , Sven Puchinger , Anna-Lena Horlemann-Trautmann

We consider a variational problem for submanifolds Q $\subset$ M with nonempty boundary $\partial$Q = K. We propose the definition that the boundary K of any critical point Q have constant mean curvature, which seems to be a new perspective…

Differential Geometry · Mathematics 2015-02-25 Rafe Mazzeo , Frank Pacard , Tatiana Zolotareva

We study a class of chainable continua which contains, among others, all inverse limit spaces generated by a single interval bonding map which is piecewise monotone and locally eventually onto. Such spaces are realized as attractors of…

Dynamical Systems · Mathematics 2020-02-19 Ana Anušić , Jernej Činč

Distance Geometry is based on the inverse problem that asks to find the positions of points, in a Euclidean space of given dimension, that are compatible with a given set of distances. We briefly introduce the field, and discuss some open…

Metric Geometry · Mathematics 2016-10-04 Leo Liberti , Carlile Lavor

We consider closed manifolds that possess a so called rank one ray structure. That is a (flat) affine structure such that the linear part is given by the products of a diagonal transformation and a commuting rotation. We show that closed…

Differential Geometry · Mathematics 2021-09-30 Raphaël Alexandre

For a large class of tilings, including the Penrose tiling in two dimension as well as the icosahedral ones in 3 dimension, the continuous hull of such a tiling inherits a minimal lamination structure with flat leaves and a transversal…

Dynamical Systems · Mathematics 2007-05-23 Jean Bellissard , Riccardo Benedetti , Jean-Marc Gambaudo

We demonstrate the existence of quasiconformal mappings on closed manifolds that cannot be decomposed as a composition of mappings with arbitrarily small conformal distortion.

Geometric Topology · Mathematics 2026-05-22 Benjamin B. McMillan

Thurston defined invariant laminations, i.e. collections of chords of the unit circle $S^1$ (called \emph{leaves}) that are pairwise disjoint inside the open unit disk and satisfy a few dynamical properties. To be directly associated to a…

Dynamical Systems · Mathematics 2016-01-18 Alexander M. Blokh , Debra Mimbs , Lex G. Oversteegen , Kirsten I. S. Valkenburg

We consider the geometric inverse problem of determining a closed Riemannian manifold from measurements of the heat kernel in an open subset of the manifold. In this paper we analyze the stability of this problem in the class of…

Differential Geometry · Mathematics 2024-04-24 Yaroslav Kurylev , Matti Lassas , Jinpeng Lu , Takao Yamaguchi

Cylinder-shaped perfect lens deduced from the coordinate transformation method is proposed. The previously reported perfect slab lens is noticed to be a limiting form of the cylindrical lens when the inner radius approaches infinity with…

Optics · Physics 2008-09-30 Min Yan , Wei Yan , Min Qiu

We establish the vanishing for non-trivial unitary representations of the bounded cohomology of SL_d up to the rank. It holds more generally for uniformly bounded representations on superreflexive spaces. The same results are obtained for…

Group Theory · Mathematics 2010-01-18 Nicolas Monod