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The main purpose of this paper is to study the vector groupoids. This is an algebraic structure which combines the concepts of Brandt groupoid and vector space such that these are compatible.

Group Theory · Mathematics 2010-12-22 Vasile Poputa , Gheorghe Ivan

In this paper we introduce the concept of generalized vector groupoid. Several properties of them are established.

Group Theory · Mathematics 2011-01-10 Vasile Poputa , Gheorghe Ivan

We introduce and explore a new concept of evasive subspace with respect to a collection of subspaces sharing a common dimension, most notably partial spreads. We show that this concept generalises known notions of subspace scatteredness and…

Combinatorics · Mathematics 2023-10-17 Anina Gruica , Alberto Ravagnani , John Sheekey , Ferdinando Zullo

Recently, a geometrical characterization of vector spaces served to generalize them into a new class of algebras. Instead of the algebraic properties of the underlying fields, we generalized the recently discovered property of such spaces…

Algebraic Geometry · Mathematics 2019-01-23 Gabriele Ricci

I discuss possible definitions of categories of vector spaces enriched with a notion of formal infinite linear combination in the likes of the formal infinite linear combinations one has in the context of generalized power series, I call…

Category Theory · Mathematics 2026-03-10 Pietro Freni

A new generalization of Grassmannians, called {\nu}-grassmannians, and a canonical super vector bundle over this new space, say {\Gamma}, are introduced. Then, constructing a Gauss supermap of a super vector bundle, the universal property…

Differential Geometry · Mathematics 2018-02-16 Mohammad Javad Afshari , Saad Varsaie

In this paper, we prove that the world of near-vector spaces allows us to work with non-linear problems and yet, gives access to most of the tools linear algebra has to offer. We establish some fundamental results for near-vector spaces…

Rings and Algebras · Mathematics 2023-12-07 Sophie Marques , Daniella Moore

The subject of the paper is the geometry and topology of cosmological spacetimes and vector bundles thereon, which are used to model physical fields propagating in the universe. Global hyperbolicity and factorization properties of the…

Mathematical Physics · Physics 2021-03-31 Zhirayr Avetisyan

In this paper we discuss various philosophical aspects of the hyperstructure concept extending networks and higher categories. By this discussion we hope to pave the way for applications and further developments of the mathematical theory…

General Mathematics · Mathematics 2015-12-02 Nils A. Baas

We present a concise proof for the supporting hyperplane theorem. We then observe that the proof not only establishes the supporting hyperplane theorem but also extends it to a hyperplane separation theorem for certain non-convex sets. The…

Optimization and Control · Mathematics 2023-10-10 Ali Taherinassaj , Yiling Chen

Distributional semantics creates vector-space representations that capture many forms of semantic similarity, but their relation to semantic entailment has been less clear. We propose a vector-space model which provides a formal foundation…

Computation and Language · Computer Science 2016-07-14 James Henderson , Diana Nicoleta Popa

We develop a Hilbert space framework for a number of general multi-scale problems from dynamics. The aim is to identify a spectral theory for a class of systems based on iterations of a non-invertible endomorphism. We are motivated by the…

Dynamical Systems · Mathematics 2007-05-23 Dorin Ervin Dutkay , Palle E. T. Jorgensen

The notion of {\it free} generalized vertex algebras is introduced. It is equivalent to the notion of {\it generalized principal subspaces} associated with lattices which are not necessarily integral. Combinatorial bases and the characters…

Quantum Algebra · Mathematics 2015-02-19 Kazuya Kawasetsu

We provide base change theorems, projection formulae and Verdier duality for both cohomology and homology in the context of finite topological spaces

Algebraic Topology · Mathematics 2021-02-09 Carmona Sánchez , V. , Maestro Pérez , C. , Sancho de Salas , F. , Torres Sancho , J. F

A generalization of metric space is presented which is shown to admit a theory strongly related to that of ordinary metric spaces. To avoid the topological effects related to dropping any of the axioms of metric space, first a new, and…

Metric Geometry · Mathematics 2012-01-20 Ittay Weiss

We develop a vector space semantics for Lambek Calculus with Soft Subexponentials, apply the calculus to construct compositional vector interpretations for parasitic gap noun phrases and discourse units with anaphora and ellipsis, and…

Logic in Computer Science · Computer Science 2023-10-09 Lachlan McPheat , Hadi Wazni , Mehrnoosh Sadrzadeh

We investigate the most general "phase space" of configurations, consisting of all possible ways of assigning elementary attributes, "energies", to elementary positions, "cells". We discuss how this space possesses structures that can be…

High Energy Physics - Theory · Physics 2009-02-09 Andrea Gregori

In a series of papers in the 1960's, S. G\"ahler defined and investigated so-called m-metric spaces and their topological properties. An m-metric assigns to any tuple of m+1 elements a real value (more generally an element in a partially…

Metric Geometry · Mathematics 2024-12-03 Wolf-Jürgen Beyn

In the paper, notions of relative separability for hypergraphs of models of a theory are defined. Properties of these notions and applications to ordered theories are studied: characterizations of relative separability both in a general…

Logic · Mathematics 2018-02-23 Beibut Kulpeshov , Sergey Sudoplatov

We provide a complete structure theorem for involutory matrices. This yields a new approach to principal angles between subspaces and provide a series of nice formulae for these angles.

Functional Analysis · Mathematics 2026-02-24 Jean-Christophe Bourin , Eun-Young Lee