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We define the universal exponential extension of an algebraically closed differential field and investigate its properties in the presence of a nice valuation and in connection with linear differential equations. Next we prove normalization…

Commutative Algebra · Mathematics 2026-04-28 Matthias Aschenbrenner , Lou van den Dries , Joris van der Hoeven

It is shown how the gauge of the ``regular finite initial value problem at spacelike infinity'' can be used to construct a certain type of estimates for the Maxwell field propagating on a Schwarzschild background. These estimates are…

General Relativity and Quantum Cosmology · Physics 2008-02-29 Juan A. Valiente Kroon

In this paper we prove existence of complete minimal surfaces in some metric semidirect products. These surfaces are similar to the doubly and singly periodic Scherk minimal surfaces in $\mathbb R^3$. In particular, we obtain these surfaces…

Differential Geometry · Mathematics 2019-02-20 Ana Menezes

This paper characterizes the quasilocal fields from the class of Henselian valued fields with totally indivisible value groups, which possess finite separable extensions of nontrivial defect. We show that, for any prime number $q$, a…

Rings and Algebras · Mathematics 2014-12-12 I. D. Chipchakov

In this paper we work in o-minimal structures with definable Skolem functions and show that a continuous definable map between Hausdorff locally definably compact definable spaces is definably proper if and only if it is proper morphism in…

Logic · Mathematics 2015-07-14 Mário Edmundo , Marcello Mamino , Luca Prelli

We prove that the morphisms from a minimal Sullivan algebra $\Lambda V$ to $A_{PL}(|\Lambda V|)$, the algebra of polynomial differential forms on its realization, can be quasi-isomorphic if and only if the cohomology $H(\Lambda V)$ is of…

Algebraic Topology · Mathematics 2024-09-26 Jiawei Zhou

We discuss the relation between questions regarding the essential normality of finitely generated essentially spherical isometries and some results and conjectures of Arveson and Guo-Wang on the closure of homogeneous ideals in the m-shift…

Operator Algebras · Mathematics 2008-07-25 Ronald G. Douglas , Jaydeb Sarkar

We study a collection of Hessenberg varieties in the type A flag variety associated to a nonzero semisimple matrix whose conjugacy class has minimal dimension. We prove each such minimal semisimple Hessenberg variety is a union Richardson…

Algebraic Geometry · Mathematics 2024-12-13 Rebecca Goldin , Martha Precup

We prove minimax theorems for lower semicontinuous functions defined on a Hilbert space. The main tool is the theory of $\Phi$-convex functions and sufficient and necessary conditions for the minimax equality to hold for $\Phi$-convex…

Optimization and Control · Mathematics 2016-06-29 Ewa M. Bednarczuk , Monika Syga

In this article, we present a formalization of spherically complete spaces, which is a fundamental notion in non-archimedean functional analysis. This work includes the equivalent definitions of spherically complete spaces, their basic…

Number Theory · Mathematics 2026-02-17 Yijun Yuan

We show that a properly immersed minimal hypersurface in M x R_+ equals some M x {c} when M is a complete, recurrent n-dimensional Riemannian manifold with bounded curvature. If on the other hand, M has nonnegative Ricci curvature with…

Differential Geometry · Mathematics 2012-06-18 Harold Rosenberg , Felix Schulze , Joel Spruck

We investigate the computability-theoretic properties of valued fields, and in particular algebraically closed valued fields and $p$-adically closed valued fields. We give an effectiveness condition, related to Hensel's lemma, on a valued…

Logic · Mathematics 2017-09-29 Matthew Harrison-Trainor

The purpose of this paper is to prove the finiteness theorems for meromorphic mappings of a complete connected K\"{a}hler manifold into projective space sharing few hyperplanes in subgeneral position without counting multiplicity, where all…

Complex Variables · Mathematics 2020-03-10 Thoan Pham Duc , Tuyen Nguyen Dang , Vangty Noulorvang

I analyze $\mathcal{O}$-weakly immediate and $\mathcal{O}$-residual types in an o-minimal expansion of an ordered field $\mathbb{E}$, where $\mathcal{O}$ is a convex valuation ring. The main result is a characterization of those exponential…

Logic · Mathematics 2025-11-18 Pietro Freni

We make use of Friedrich's representation of spatial infinity to study asymptotic expansions of the Maxwell-scalar field system near spatial infinity. The main objective of this analysis is to understand the effects of the non-linearities…

General Relativity and Quantum Cosmology · Physics 2022-09-14 Marica Minucci , Rodrigo Panosso Macedo , Juan Antonio Valiente Kroon

We show that min-max minimal hypersurfaces can be localized. As a consequence, we obtain the sharp generalization to complete manifolds of the famous Almgren-Pitts min-max theorem in closed manifolds. We use this result to prove the…

Differential Geometry · Mathematics 2023-10-13 Douglas Stryker

We present a new construction of embedded minimal surfaces in hyperbolic space with $3$ asymptotically totally geodesic ends and arbitrary finite genus.

Differential Geometry · Mathematics 2018-06-01 Asun Jiménez Grande , Graham Smith

We show that all the K-finite matrix elements of irreducible Harish-Chandra modules can can be expressed in spherical functions using finite number of operations

Representation Theory · Mathematics 2012-11-27 Yuri A Neretin

In this article, we consider the minimal $L^2$ integrals for the Hardy spaces and the Bergman spaces, and we present some relations between them, which can be regarded as the solutions of the finite points versions of Saitoh's conjecture…

Complex Variables · Mathematics 2023-04-05 Qi'an Guan , Zheng Yuan

We consider properly immersed finite topology minimal surfaces S in complete finite volume hyperbolic 3-manifolds N, and in M x S(1), where M is a complete hyperbolic surface of finite area. We prove S has finite total curvature equal to…

Differential Geometry · Mathematics 2013-04-08 Pascal Collin , Laurent Hauswirth , Harold Rosenberg