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In this paper we introduce congruence spaces, which are topological spaces that are canonically attached to monoid schemes and that reflect closed topological properties. This leads to satisfactory topological characterizations of closed…

Algebraic Geometry · Mathematics 2023-05-23 Oliver Lorscheid , Samarpita Ray

In this paper we introduce a new technique to prove the existence of closed subspaces of maximal dimension inside sets of topological vector sequence spaces. The results we prove cover some sequence spaces not studied before in the context…

Functional Analysis · Mathematics 2015-10-06 Geraldo Botelho , Daniel Cariello , Vinícius Fávaro , Daniel Pellegrino

We give an elementary introduction to hyperk\"ahler manifolds, survey some of their interesting properties and some open problems.

Algebraic Geometry · Mathematics 2021-12-07 Elham Izadi , Samir Canning , Yajnaseni Dutta , David Stapleton

In this current study, the most apparent aspect is to submit a new geometric sequence space. We investigate its topological properties , inclusion relations, Geometric statistical convergence and Geometric property of Orlicz function and .…

Functional Analysis · Mathematics 2022-11-02 Saubhagyalaxmi Singh

In this paper we present another notion of a smooth manifold with corners and relate it to the commonly used concept in the literature. Afterwards we introduce complex manifolds with corners and show that if $M$ is a compact (respectively…

Differential Geometry · Mathematics 2010-01-04 Christoph Wockel

This is a review paper about symmetric products of spaces $SP^n(X):= X^n/S_n$. We focus our attention on the symmetric products of 2-manifolds and make a journey through selected topics of algebraic topology, algebraic geometry,…

Algebraic Topology · Mathematics 2007-05-23 Pavle Blagojevic , Vladimir Grujic , Rade Zivaljevic

In this survey article we provide an introduction to submanifold geometry in symmetric spaces of noncompact type. We focus on the construction of examples and the classification problems of homogeneous and isoparametric hypersurfaces, polar…

Differential Geometry · Mathematics 2019-01-16 Jose Carlos Diaz-Ramos , Miguel Dominguez-Vazquez , Victor Sanmartin-Lopez

Random shapes arise naturally in many contexts. The topological and geometric structure of such objects is interesting for its own sake, and also for applications. In physics, for example, such objects arise naturally in quantum gravity, in…

Combinatorics · Mathematics 2016-07-26 Matthew Kahle

The aim of this paper is to establish the equivalence between the concepts of an $S$-metric space and a cone $S$-metric space using\ some topological approaches. We introduce a new notion of $TVS$-cone $S$-metric space using some facts…

General Topology · Mathematics 2018-01-03 Nihal Taş

We investigate the connection between the spatiality of locale products and the earlier studies of the author on the locally fine coreflection of the products of uniform spaces. After giving a historical introduction and indicating the…

General Topology · Mathematics 2007-05-23 Aarno Hohti

This is a brief and gentle introduction, aimed at graduate students, to the subject of model subspaces of the Hardy space.

Complex Variables · Mathematics 2013-12-19 Stephan Ramon Garcia , William T. Ross

We study algebraic and topological properties of subsets of preorders on a group. In particular we study properties of the composition of two preorders, generalize a topological theorem of \cite{S} in the case of standard orders and show…

Group Theory · Mathematics 2021-02-17 Julie Decaup

The first aim of this study is to define soft sequential compact metric spaces and to investigate some important theorems on soft sequential compact metric space. Second is to introduce net and totally bounded soft metric space and study…

General Mathematics · Mathematics 2013-08-16 Sadi Bayramov , Cigdem Gunduz , Murat I. Yazar

We first introduce global arithmetic cohomology groups for quasi-coherent sheaves on arithmetic varieties, adopting an adelic approach. Then, we establish fundamental properties, such as topological duality and inductive long exact…

Algebraic Geometry · Mathematics 2015-07-23 K. Sugahara , L. Weng

Molodtsov initiated the concept of soft sets in Molodtsov D. Maji et al. defined some operations on soft sets in Maji P. K., Bismas R., Roy A. R. The concept of soft topological space was introduced by some authors. In this paper, we…

General Topology · Mathematics 2014-03-13 Taha Yasin Ozturk , Sadi Bayramov

We introduce cosymplectic circles and cosymplectic spheres, which are the analogues in the cosymplectic setting of contact circles and contact spheres. We provide a complete classification of compact 3-manifolds that admit a cosymplectic…

Differential Geometry · Mathematics 2015-12-11 Beniamino Cappelletti-Montano , Antonio De Nicola , Ivan Yudin

In this paper, we discuss the basic properties of Alexandroff spaces. Several examples of Alexandroff spaces are given. We show how to construct new Alexandroff spaces from given ones. Finally, two invariants for compact Alexandroff spaces…

General Topology · Mathematics 2007-08-17 Timothy Speer

This paper is a contribution to piecewise linear (PL) symplectic topology. We define the notion of PL symplectic manifold as being a combinatorial manifold endowed with a piecewise constant Whitney symplectic form and investigate possible…

Differential Geometry · Mathematics 2024-06-27 Mélanie Bertelson , Julie Distexhe

Inspired by the concept of hyperconvexity and its relation to curvature, we translate geometric properties of a metric space encoded by the curvature inequalities into the persistent homology induced by the \v{C}ech filtration of that…

Geometric Topology · Mathematics 2020-01-29 Parvaneh Joharinad , Jürgen Jost

Represented spaces form the general setting for the study of computability derived from Turing machines. As such, they are the basic entities for endeavors such as computable analysis or computable measure theory. The theory of represented…

Logic · Mathematics 2015-03-04 Arno Pauly