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The existence of a model structure on the category $\mathcal{D}$ of diffeological spaces is crucial to developing smooth homotopy theory. We construct a compactly generated model structure on the category $\mathcal{D}$ whose weak…

Algebraic Topology · Mathematics 2018-06-28 Hiroshi Kihara

We introduce a notion of complexity of diagrams (and in particular of objects and morphisms) in an arbitrary category, as well as a notion of complexity of functors between categories equipped with complexity functions. We discuss several…

Category Theory · Mathematics 2020-07-01 Saugata Basu , M. Umut Isik

We prove that the extended Khovanov arc algebras are isomorphic to the basic algebras of anti-spherical Hecke categories for maximal parabolics of symmetric groups. We present these algebras by quiver and relations and provide the full…

Representation Theory · Mathematics 2023-09-26 Chris Bowman , Maud De Visscher , Amit Hazi , Catharina Stroppel

We give a graphical calculus for a categorification of a Clifford algebra and its Fock space representation via differential graded categories. The categorical action is motivated by the gluing action between the contact categories of…

Representation Theory · Mathematics 2013-09-25 Yin Tian

We construct a functor from the Hecke category to a groupoid built from the underlying Coxeter group. This fixes a gap in an earlier work of the authors. This functor provides an abstract realization of the localization of the Hecke…

Representation Theory · Mathematics 2022-12-20 Ben Elias , Geordie Williamson

We prove a new symplectic analogue of Kashiwara's Equivalence from D-module theory. As a consequence, we establish a structure theory for module categories over deformation quantizations that mirrors, at a higher categorical level, the…

Algebraic Geometry · Mathematics 2024-07-11 Gwyn Bellamy , Christopher Dodd , Kevin McGerty , Thomas Nevins

We describe the structure of module categories of finite dimensional algebras over an algebraically closed field for which the cycles of nonzero nonisomorphisms between indecomposable finite dimensional modules are finite (do not belong to…

Representation Theory · Mathematics 2013-10-24 Piotr Malicki , José A. de la Peña , Andrzej Skowroński

For a root system of type $B$ we study an algebra similar to a graded Hecke algebra, isomorphic to a subalgebra of the rational Cherednik algebra. We introduce principal series modules over it and prove an irreducibility criterion for these…

Representation Theory · Mathematics 2007-05-23 C. Dezelee

This paper is a survey on the representation theory of Hecke algebras, Ariki-Koike algebras and connections with quantum group.

Representation Theory · Mathematics 2007-05-23 Nicolas Jacon

Since the time when the first optical instruments have been invented, an idea that the visible image of an object under observation depends on tools of observation became commonly assumed in physics. A way to formalize it in mathematics is…

Functional Analysis · Mathematics 2019-03-14 S. S. Akbarov

For any length category, we establish a set of rules (necessary and sufficient) that ensure a partial order on the isomorphism classes of simple objects such that the category is equivalent to the category of finite dimensional…

Representation Theory · Mathematics 2026-04-07 Henning Krause

Lifts of categorical diagrams $D\colon\mathsf{J}\to\mathsf{X}$ against discrete opfibrations $\pi\colon\mathsf{E}\to\mathsf{X}$ can be interpreted as presenting solutions to systems of equations. With this interpretation in mind, it is…

Category Theory · Mathematics 2024-01-24 Kevin Arlin , James Fairbanks , Tim Hosgood , Evan Patterson

We study the categories of discrete modules for topological rings arising as the rings of operations in various kinds of topological K-theory. We prove that for these rings the discrete modules coincide with those modules which are locally…

Algebraic Topology · Mathematics 2010-10-25 A. J. Hignett , Sarah Whitehouse

We develop a systematic framework for constructing spherical harmonics on the two-dimensional unit sphere as superpositions of Gaussian beams whose poles form well-separated point configurations. The distributional and analytic properties…

Classical Analysis and ODEs · Mathematics 2025-10-22 Xiaolong Han

We give a classification of the graded simple modules of cyclotomic quiver Hecke algebras of type A using the diagram calculus of the diagrammatic Cherednik algebra. We also obtain a non-trivial lower bound for the dimension of the simple…

Representation Theory · Mathematics 2020-08-06 Alexander Ferdinand Kerschl

This paper gives the classification of the Whittaker unitary dual for affine graded Hecke algebras of type E. By the Iwahori-Matsumoto involution, this is equivalent also to the classification of the spherical unitary dual for type E. This…

Representation Theory · Mathematics 2014-01-14 Dan Barbasch , Dan Ciubotaru

We construct a model category structure on the category of diffeological spaces which is Quillen equivalent to the model structure on the category of topological spaces based on the notions of Serre fibrations and weak homotopy…

Algebraic Topology · Mathematics 2018-10-10 Tadayuki Haraguchi , Kazuhisa Shimakawa

We construct large families of harmonic morphisms which are holomorphic with respect to Hermitian structures by finding heierarchies of Weierstrass-type representations. This enables us to find new examples of complex-valued harmonic…

dg-ga · Mathematics 2008-02-03 P. Baird , J. C. Wood

In this paper we use the Hecke algebra of type $B$ to define a new algebra $\Sch$ which is an analogue of the q-Schur algebra. We construct Weyl modules for $\Sch$ and obtain, as factor modules, a family of irreducible $\Sch$-modules over…

q-alg · Mathematics 2008-02-03 Richard Dipper , Gordon James , Andrew Mathas

We study complexes of stable $\infty$-categories, referred to as categorical complexes. As we demonstrate, examples of such complexes arise in a variety of subjects including representation theory, algebraic geometry, symplectic geometry,…

Algebraic Geometry · Mathematics 2024-02-16 Merlin Christ , Tobias Dyckerhoff , Tashi Walde
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