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We propose a construction of affine space (or "polynomial rings") over a triangulated category, in the context of stable derivators.

Algebraic Geometry · Mathematics 2024-09-10 Paul Balmer , John Zhang

A semi-projective representation is a homomorphism of a finite group into the group of semi-projective transformations of a finite dimensional vector space over a field. Schur's concept of a representation group for projective…

Group Theory · Mathematics 2023-05-05 Massimiliano Alessandro , Christian Gleissner , Julia Kotonski

In the first part of this paper we study minimal representations of simply connected simple split groups of type $D_k$ or $E_k$ over local non-archimedian fields. Our main result is an explicit formula for the spherical vectors in these…

Representation Theory · Mathematics 2007-05-23 David Kazhdan , Alexander Polishchuk

This brief exposition presents some basic properties of scalable monoids and quantity spaces, introduced in arXiv:1408.5024

Rings and Algebras · Mathematics 2019-05-21 Dan Jonsson

We introduce a finite-dimensional algebra that controls the possible boundary conditions of a conformal field theory. For theories that are obtained by modding out a Z_2 symmetry (corresponding to a so-called D_odd-type, or half-integer…

High Energy Physics - Theory · Physics 2009-10-30 J. Fuchs , C. Schweigert

We generalize the concept of a field by allowing addition to be a partial operation. We show that elements of such a "partially additive field" share many similarities with physical quantities. In particular, they form subsets of mutually…

Mathematical Physics · Physics 2025-02-04 Georgy Alymov

We give a simplified proof of J. A. Wolf's classification of finite groups that can act freely and isometrically on a round sphere of some dimension. We slightly improve the classification by removing some non-obvious redundancy. The groups…

Geometric Topology · Mathematics 2016-09-15 Daniel Allcock

We characterize all possible relative positions between a hyperboloid of one sheet and a sphere through the roots of a characteristic polynomial associated to these quadrics. The classification is also suitable for a hyperboloid and a…

Metric Geometry · Mathematics 2016-05-05 M. Brozos-Vázquez , M. J. Pereira-Sáez , M. J. Souto-Salorio , Ana D. Tarrío-Tobar

Using complexified quaternions, a formalism without Lorentz frames, and therefore also without vierbeins, for dealing with tensor and spinor fields in curved spacetime is presented. A local U(1) gauge symmetry, which, it is speculated,…

Mathematical Physics · Physics 2015-05-13 John Fredsted

In this paper we introduce and study some basic properties of the Fock space (also known as Segal-Bargmann space) in the slice hyperholomorphic setting. We discuss both the case of slice regular functions over quaternions and also the case…

Complex Variables · Mathematics 2014-06-24 Daniel Alpay , Fabrizio Colombo , Irene Sabadini , Guy Salomon

Spherical manifolds yield cosmic spaces with positive curvature. They result by closing pieces from the sphere used by Einstein for his initial cosmology. Harmonic analysis on the manifolds aims at explaining the observed low amplitudes at…

Cosmology and Nongalactic Astrophysics · Physics 2010-11-19 Peter Kramer

The first section of this modest survey reviews some basic notions and describes some families of examples, and the second section briefly indicates some general aspects of analysis on metric spaces. The remaining three sections are…

Classical Analysis and ODEs · Mathematics 2007-05-23 Stephen Semmes

In a previous paper, we obtained a cohomological obstruction to the existence of compact manifolds locally modelled on a homogeneous space. In this paper, we give a classification of the semisimple symmetric spaces to which this obstruction…

Differential Geometry · Mathematics 2019-04-22 Yosuke Morita

The irreducible alternative superbimodules are studied. The complete classification is obtained for even bimodules of arbitrary dimension and for finite-dimensional irreducible superbimodules over an algebraically closed field.

Rings and Algebras · Mathematics 2014-01-14 Ivan Shestakov , Maria Trushina

This paper is an introduction to soft cone metric spaces. We define the concept of soft cone metric via soft element, investigate soft converges in soft cone metric spaces and prove some fixed point theorems for contractive mappings on soft…

General Mathematics · Mathematics 2016-10-06 İsmet Altıntaş , Kemal Taşköprü

We introduce the notion of symplectic microfolds and symplectic micromorphisms between them. They form a monoidal category, which is a version of the "category" of symplectic manifolds and canonical relations obtained by localizing them…

Symplectic Geometry · Mathematics 2020-03-13 Alberto S. Cattaneo , Benoit Dherin , Alan Weinstein

A projective mirror polyhedron is a projective polyhedron endowed with reflections across its faces. We construct an explicit diffeomorphism between the moduli space of a mirror projective polyhedron with fixed dihedral angles in…

Geometric Topology · Mathematics 2012-04-26 Ludovic Marquis

Layered monoidal theories provide a categorical framework for studying scientific theories at different levels of abstraction, via string diagrammatic algebra. We introduce models for three closely related classes of layered monoidal…

Category Theory · Mathematics 2026-02-27 Leo Lobski , Fabio Zanasi

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

I extend the framework of rigid analytic geometry to the setting of algebraic geometry relative to monoids, and study the associated notions of separated, proper, and overconvergent morphisms. The category of affine manifolds embeds as a…

Algebraic Geometry · Mathematics 2015-05-29 Andrew W. Macpherson