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We clarify the relationship between Grothendieck duality \`a la Neeman and the Wirthm\"uller isomorphism \`a la Fausk-Hu-May. We exhibit an interesting pattern of symmetry in the existence of adjoint functors between compactly generated…

Category Theory · Mathematics 2019-02-20 Paul Balmer , Ivo Dell'Ambrogio , Beren Sanders

This text is dedicated to the development of the theory of $(\infty,\omega)$-categories. We present generalizations of standard results from category theory, such as the lax Grothendieck construction, the Yoneda lemma, lax (co)limits and…

Category Theory · Mathematics 2024-11-26 Félix Loubaton

A double category of relations is essentially a cartesian equipment with strong, discrete and functorial tabulators and for which certain local products satisfy a Frobenius Law. A double category of relations is equivalent to a double…

Category Theory · Mathematics 2022-11-18 Michael Lambert

The self-duality of the paracyclic category is extended to a certain class of homotopy categories of (2,1)-categories. These generalise the orbit category of a group and are associated to certain self-dual preorders equipped with a presheaf…

Category Theory · Mathematics 2022-02-28 John Boiquaye , Philipp Joram , Ulrich Krähmer

In the setting of C*-categories, we provide a definition of "spectrum" of a commutative full C*-category as a one-dimensional unital saturated Fell bundle over a suitable groupoid (equivalence relation) and prove a categorical Gelfand…

Operator Algebras · Mathematics 2011-12-30 Paolo Bertozzini , Roberto Conti , Wicharn Lewkeeratiyutkul

For Pontryagin's group duality in the setting of locally compact topological Abelian groups, the topology on the character group is the compact open topology. There exist at present two extensions of this theory to topological groups which…

Group Theory · Mathematics 2009-11-10 R. Beattie , H. -P. Butzmann

The bulk of this paper is devoted to the comparison of several models for the theory of (infinity,2)-categories: that is, higher categories in which all k-morphisms are invertible for k > 2 (the case of (infinity,n)-categories is also…

Category Theory · Mathematics 2009-05-08 Jacob Lurie

The choice of an isomorphism, a duality, between a finite abelian group $A$ and its character group allows one to define dual codes of additive codes over $A$. Properties of dualities and dual codes are studied, continuing work of Delsarte…

Information Theory · Computer Science 2026-01-07 Jay A. Wood

In this note we shall generalize the Stone duality between compact totally disconnected spaces and Boolean algebras to a duality between all complete non-Archimedean uniform spaces and Boolean algebras.

General Topology · Mathematics 2011-05-12 Joseph Van Name

This paper contains results from two areas -- formal theory of Kan extensions and concrete categories. The contribution to the former topic is based on the extension of the concept of Kan extension to the cones and we prove that limiting…

Category Theory · Mathematics 2011-04-19 Jan Pavlík

We prove a rank-finiteness conjecture for modular categories: up to equivalence, there are only finitely many modular categories of any fixed rank. Our technical advance is a generalization of the Cauchy theorem in group theory to the…

Quantum Algebra · Mathematics 2015-11-13 Paul Bruillard , Siu-Hung Ng , Eric C. Rowell , Zhenghan Wang

We introduce a notion of $\Theta$-categories, which is a refinement of the notion of symmetric monoidal $\infty$-categories. We use this notion to prove a Tannakian duality statement, relating $\Theta$-categories with fpqc-stacks by means…

Algebraic Geometry · Mathematics 2025-08-06 Joost Nuiten , Bertrand Toen

We define and study the derived categories of the first kind for curved DG and A-infinity algebras complete over a pro-Artinian local ring with the curvature elements divisible by the maximal ideal of the local ring. We develop the Koszul…

Category Theory · Mathematics 2019-08-28 Leonid Positselski

We introduce the class of \textit{Generalized Poincar\'{e}-Duality groups}: i.e, pro-$p$ groups of infinite rank which satisfy a Poincar\'{e}-duality. We prove some basic properties of Generalized Poincar\'{e}-Duality groups, and show that…

Group Theory · Mathematics 2024-11-14 Tamar Bar-On

Duality, the equivalence between seemingly distinct quantum systems, is a curious property that has been known for at least three quarters of a century. In the past two decades it has played a central role in mapping out the structure of…

High Energy Physics - Theory · Physics 2015-07-28 Joseph Polchinski

Noncommutative duality for C*-dynamical systems is a vast generalization of Pontryagin duality for locally compact abelian groups. In this series of lectures, we give an introduction to the categorical aspects of this duality, focusing…

Operator Algebras · Mathematics 2012-11-20 S. Kaliszewski , John Quigg

Stone duality establishes a contravariant equivalence between the category of Boolean algebras and the category of compact, Hausdorff, totally disconnected topological spaces (Stone spaces). These spaces are precisely the profinite spaces…

General Topology · Mathematics 2026-01-15 J. R. Pérez-Buendía

We formulate a $q$-Schur algebra associated to an arbitrary $W$-invariant finite set $X_{\texttt f}$ of integral weights for a complex simple Lie algebra with Weyl group $W$. We establish a $q$-Schur duality between the $q$-Schur algebra…

Representation Theory · Mathematics 2022-02-17 Li Luo , Weiqiang Wang

Duality symmetries in supergravity theories, together with their implications for string theory, are reviewed.

High Energy Physics - Theory · Physics 2025-04-15 Chris Hull

Interest in weak cubical n-categories arises in various contexts, in particular in topological field theories. In this paper, we describe a concept of double bicategory, namely a strict model of the theory of bicategories in Bicat. We show…

Category Theory · Mathematics 2010-01-15 Jeffrey C. Morton
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