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We introduce the notion of spectral transfer morphisms between normalized affine Hecke algebras, and show that such morphisms induce spectral measure preserving correspondences on the level of the tempered spectra of the affine Hecke…

Representation Theory · Mathematics 2015-10-13 Eric Opdam

We describe some of the basic properties of the 2-category of 2-term complexes in an abelian category, using butterflies as morphisms.

Category Theory · Mathematics 2021-07-30 Jonathan Wise

Derived decompositions of abelian categories are introduced in internal terms of abelian subcategories to construct semi-orthogonal decompositions (or Bousfield localizations, or hereditary torsion pairs) in various derived categories of…

Representation Theory · Mathematics 2018-11-26 Hongxing Chen , Changchang Xi

For an abelian category $\mathcal{A}$, we establish the relation between its derived and extension dimensions. Then for an artin algebra $\Lambda$, we give the upper bounds of the extension dimension of $\Lambda$ in terms of the radical…

Representation Theory · Mathematics 2022-05-24 Junling Zheng , Zhaoyong Huang

For a homological functor from a triangulated category to an abelian category satisfying some technical assumptions we construct a tower of interpolation categories. These are categories over which the functor factorizes and which capture…

Algebraic Topology · Mathematics 2007-09-27 Georg Biedermann

We propose a method that learns a discriminative yet semantic space for object categorization, where we also embed auxiliary semantic entities such as supercategories and attributes. Contrary to prior work which only utilized them as side…

Computer Vision and Pattern Recognition · Computer Science 2014-12-10 Sung Ju Hwang , Leonid Sigal

Let X be an abelian scheme over a scheme B. The Fourier--Mukai transform gives an equivalence between the derived category of X and the derived category of the dual abelian scheme. We partially extend this to certain schemes X over B (which…

Algebraic Geometry · Mathematics 2018-07-31 Dima Arinkin , Roman Fedorov

Embedding theorems have continued to be a topic of interest in the general theory of relativity since these help connect the classical theory to higher-dimensional manifolds. This paper deals with spacetimes of embedding class one, i.e.,…

General Relativity and Quantum Cosmology · Physics 2018-05-29 Peter K. F. Kuhfittig

This is an exposition of facts about p-local spectra, p-complete spectra and modules over the p-complete sphere spectrum, including homological criteria for finiteness. Most things are well-known to the experts, with a couple of potential…

Algebraic Topology · Mathematics 2024-12-13 Neil Strickland

We classify all subterminal schemes by characterizing their point structure, stalks, and topologies. This extends our previous classification of subterminal affine schemes, which correspond to spectra of solid rings.

Algebraic Geometry · Mathematics 2025-04-02 Jaime Benabent Guerrero

We give a geometric categorification of the Verma modules $M(\lambda)$ for quantum $\mathfrak{sl}_2$.

Representation Theory · Mathematics 2018-07-04 Grégoire Naisse , Pedro Vaz

Let $R$ be a commutative ring with unit. We consider the homotopy theory of the category of spectral sequences of $R$-modules with the class of weak equivalences given by those morphisms inducing a quasi-isomorphism at a certain fixed page.…

Algebraic Topology · Mathematics 2023-02-22 Muriel Livernet , Sarah Whitehouse

We suggest a new generalization of Pontryagin duality from the category of Abelian locally compact groups to a category which includes all Moore groups, i.e. groups whose irreducible representations are finite-dimensional. Objects in this…

Functional Analysis · Mathematics 2015-03-13 Yulia Kuznetsova

For a given measure space $(X,{\mathscr B},\mu)$ we construct all measure spaces $(Y,{\mathscr C},\lambda)$ in which $(X,{\mathscr B},\mu)$ is embeddable. The construction is modeled on the ultrafilter construction of the Stone--\v{C}ech…

General Topology · Mathematics 2014-02-26 M. R. Koushesh

We introduce the concept of the modularity of an abelian variety defined over the rational number field extending the modularity of an elliptic curve. We discuss the modularity of an abelian variety over the rational number field. We…

Number Theory · Mathematics 2026-01-30 Jae-Hyun Yang

We use homogeneous spectra of multigraded rings to construct toric embeddings of a large family of projective varieties which preserve some of the birational geometry of the underlying variety, generalizing the well-known construction…

Algebraic Geometry · Mathematics 2019-12-11 Alex Küronya , Stefano Urbinati

Given an arrangement of subtori of arbitrary codimension in a torus, we compute the cohomology groups of the complement. Then, using the Leray spectral sequence, we describe the multiplicative structure on the graded cohomology. We also…

Algebraic Topology · Mathematics 2023-03-08 Luca Moci , Roberto Pagaria

Categories of partial functions have become increasingly important principally because of their applications in theoretical computer science. In this note we prove that the category of partial bijections between sets as an…

Discrete Mathematics · Computer Science 2009-03-06 Emil Schwab

Functor morphing provides a method to translate complex representations of automorphism groups of finite modules over finite rings to representations of automorphism groups of functors in some abelian category. In this paper we give an…

Representation Theory · Mathematics 2026-03-30 Ehud Meir

Given an abelian variety over a field with a discrete valuation, Grothendieck defined a certain open normal subgroup of the absolute inertia group. This subgroup encodes information on the extensions over which the abelian variety acquires…

alg-geom · Mathematics 2008-02-03 A. Silverberg , Yu. G. Zarhin