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This treatise concerns shapes in the sense of constellations of points with various automorphisms quotiented out: continuous translations, rotations and dilations, and also discrete mirror image identification and labelling…

General Relativity and Quantum Cosmology · Physics 2018-02-15 Edward Anderson

After introducing the different boundary geometries of rank one symmetric spaces, we state and prove Fried's theorem in the general setting of all those geometries: a closed manifold with a similarity structure is either complete or the…

Differential Geometry · Mathematics 2019-09-25 Raphaël Alexandre

We derive two fixed point theorems for a class of metric spaces that includes all Banach spaces and all complete Busemann spaces. We obtain our results by the use of a 1-Lipschitz barycenter construction and an existence result for…

Metric Geometry · Mathematics 2023-03-13 Giuliano Basso

We prove that all the compact metric spaces are in the closure of the class of full matrix algebras for the quantum Gromov-Hausdorff propinquity. We also show that given an action of a compact metrizable group G on a quasi-Leibniz compact…

Operator Algebras · Mathematics 2021-11-15 Konrad Aguilar , Frederic Latremoliere

We show how Alesker's theory of valuations on manifolds gives rise to an algebraic picture of the integral geometry of any Riemannian isotropic space. We then apply this method to give a thorough account of the integral geometry of the…

Differential Geometry · Mathematics 2015-09-24 Andreas Bernig , Joseph H. G. Fu , Gil Solanes

The classical Besicovitch-Federer projection theorem implies that the d-dimensional Hausdorff measure of a set in Euclidean space with non-negligible d-unrectifiable part will strictly decrease under orthogonal projection onto almost every…

Functional Analysis · Mathematics 2017-10-11 Harrison Pugh

We reinterpret a result of Pop and Stix on the $p$-adic section conjecture in terms of Berkovich spaces and fixed points. In doing this, we see a version of the result extends to larger classes of fields, which in turn allows us to prove a…

Number Theory · Mathematics 2025-12-23 Jesse Pajwani

Given an affine variety $X$, a morphism $\phi:X\to X$, a point $\alpha\in X$, and a Zariski closed subset $V$ of $X$, we show that the forward $\phi$-orbit of $\alpha$ meets $V$ in at most finitely many infinite arithmetic progressions, and…

Dynamical Systems · Mathematics 2014-09-16 Clayton Petsche

In this article, we study the Lipschitz Geometry at infinity of complex analytic sets and we obtain results on algebraicity of analytic sets and on Bernstein's problem. Moser's Bernstein Theorem says that a minimal hypersurface which is a…

Complex Variables · Mathematics 2022-07-19 José Edson Sampaio

Polyadic arithmetics is a branch of mathematics related to $p$--adic theory. The aim of the present paper is to show that there are very close relations between polyadic arithmetics and the classic theory of commutative Banach algebras.…

Number Theory · Mathematics 2007-05-23 S. Albeverio , V. Polischook

We give a survey of joint work with Mircea Musta\c{t}\u{a} and Chenyang Xu on the connections between the geometry of Berkovich spaces over the field of Laurent series and the birational geometry of one-parameter degenerations of smooth…

Algebraic Geometry · Mathematics 2014-09-19 Johannes Nicaise

Let $X$ be a completely regular space. For a non-vanishing self-adjoint Banach subalgebra $H$ of $C_B(X)$ which has local units we construct the spectrum $\mathfrak{sp}(H)$ of $H$ as an open subspace of the Stone-Cech compactification of…

Functional Analysis · Mathematics 2017-06-19 M. Farhadi , M. R. Koushesh

In our previous paper "Bruhat-Tits theory from Berkovich's point of view. I ? Realizations and compactifications of buildings", we investigated realizations of the Bruhat-Tits building B(G,k) of a connected and reductive linear algebraic…

Group Theory · Mathematics 2012-10-04 Bertrand Remy , Amaury Thuillier , Annette Werner

Continuous mappings between compact Hausdorff spaces can be studied using homomorphisms between algebraic structures (lattices, Boolean algebras) associated with the spaces. This gives us more tools with which to tackle problems about these…

General Topology · Mathematics 2007-05-23 Klaas Pieter Hart

We give a survey of analytic and geometric results on `fibred cusp spaces', a large class of non-compact Riemannian manifolds which include the regular parts of singular spaces with incomplete cusp singularities as well as complete spaces…

Differential Geometry · Mathematics 2026-04-20 Daniel Grieser , Álvaro Sánchez-Hernández , Boris Vertman

For a new class of topological vector spaces, namely $\kappa $-normed spaces, and associated quasisemilinear topological preordered space is defined and investigated. This structure arise naturally from the consideration of a $\kappa…

Functional Analysis · Mathematics 2007-05-23 S. V. Ludkovsky , J. C. Ferrando

The paper studies projective freeness and Hermiteness of algebras of complex-valued continuous functions on topological spaces, Stein algebras, and commutative unital Banach algebras. New sufficient cohomology conditions on the maximal…

Functional Analysis · Mathematics 2023-09-19 Alexander Brudnyi , Amol Sasane

Let K be a field that is complete with respect to a nonarchimedean absolute value such that K has a countable dense subset. We prove that the Berkovich analytification V^an of any d-dimensional quasi-projective scheme V over K embeds in…

Algebraic Geometry · Mathematics 2015-06-04 Ehud Hrushovski , François Loeser , Bjorn Poonen

We study the fundamental properties of pointwise semi-Lipschitz functions between asymmetric spaces, which are the natural asymmetric counterpart of pointwise Lipschitz functions. We also study the influence that partial symmetries of a…

Functional Analysis · Mathematics 2024-10-10 Estíbalitz Durand-Cartagena , Jesús Á. Jaramillo , Francisco Venegas M

In this paper we continue the work of using the recent advances in algebraic $K$-theory to extend computations done in characteristic $p$ to the mixed characteristic setting using perfectoid rings. We extend the work of Hesselholt-Nikolaus…

K-Theory and Homology · Mathematics 2022-04-01 Noah Riggenbach