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Let $\mathbb{k}$ be a characteristic zero domain. For a locally unital $\mathbb{k}$-superalgebra $A$ with distinguished idempotents $I$and even subalgebra $a \subseteq A_{\bar 0}$, we define and study an associated diagrammatic monoidal…

Representation Theory · Mathematics 2023-02-09 Nicholas Davidson , Jonathan R. Kujawa , Robert Muth , Jieru Zhu

Generalizing the polynomial web category, we introduce a diagrammatic $\Bbbk$-linear monoidal category, the affine web category, for any commutative ring $\Bbbk$. Integral bases consisting of elementary diagrams are obtained for the affine…

Representation Theory · Mathematics 2026-01-08 Linliang Song , Weiqiang Wang

We introduce a new diagrammatic $\Bbbk$-linear monoidal supercategory $QWeb^\bullet$, the affine web supercategory of type $Q$, where $\Bbbk$ is a commutative ring of characteristic not two. This category is the affinization of the web…

Representation Theory · Mathematics 2025-06-24 Linliang Song , Xingyu Wang

Using the affine web category introduced in a prequel as a building block, we formulate a diagrammatic $\Bbbk$-linear monoidal category, the affine Schur category, for any commutative ring $\Bbbk$. We then formulate diagrammatic categories,…

Representation Theory · Mathematics 2024-12-25 Linliang Song , Weiqiang Wang

We formulate two new $\mathbb Z[q,q^{-1}]$-linear diagrammatic monoidal categories, the affine $q$-web category and the affine $q$-Schur category, as well as their respective cyclotomic quotient categories. Diagrammatic integral bases for…

Representation Theory · Mathematics 2025-04-15 Yaolong Shen , Linliang Song , Weiqiang Wang

We introduce the oriented Brauer-Clifford and degenerate affine oriented Brauer-Clifford supercategories. These are diagrammatically defined monoidal supercategories which provide combinatorial models for certain natural monoidal…

Representation Theory · Mathematics 2023-09-13 Jonathan Brundan , Jonathan Comes , Jonathan R. Kujawa

We define the affine Frobenius Brauer categories associated to each symmetric involutive Frobenius superalgebra $A$. We then define an action of these categories on the categories of finite-dimensional supermodules for orthosymplectic Lie…

Representation Theory · Mathematics 2025-09-22 Saima Samchuck-Schnarch

A new class of locally unital and locally finite dimensional algebras $A$ over an arbitrary algebraically closed field is discovered. Each of them admits an upper finite weakly triangular decomposition, a generalization of an upper finite…

Representation Theory · Mathematics 2020-12-08 Mengmeng Gao , Hebing Rui , Linliang Song

Webs are combinatorial diagrams used to encode homomorphisms between representations of Lie (super)algebras and related objects. This paper extends the theory of webs to the quantum group of type Q. We define a monoidal supercategory of…

Representation Theory · Mathematics 2020-01-06 Gordon C. Brown , Nicholas J. Davidson , Jonathan R. Kujawa

We definitively establish that the theory of symmetric Macdonald polynomials aligns with quantum and affine Schubert calculus using a discovery that distinguished weak chains can be identified by chains in the strong (Bruhat) order poset on…

Combinatorics · Mathematics 2014-02-07 Avinash J. Dalal , Jennifer Morse

Codimension one webs are configurations of finitely many codimension one foliations in general position. Much of the classical theory evolved around the concept of abelian relation: a functional relation among the first integrals of the…

Complex Variables · Mathematics 2010-04-02 Jorge Vitorio Pereira , Luc Pirio

A strict monoidal category referred to as affine Brauer category $\mathcal{AB}$ is introduced over a commutative ring $\kappa$ containing multiplicative identity $1$ and invertible element $2$. We prove that morphism spaces in…

Representation Theory · Mathematics 2023-07-18 Hebing Rui , Linliang Song

An $\mathcal{A}$-semigroup is a numerical semigroup without consecutive small elements. This work generalizes this concept to finite-complement submonoids of an affine cone $\mathcal{C}$. We develop algorithmic procedures to compute all…

Commutative Algebra · Mathematics 2025-06-23 J. C. Rosales , R. Tapia-Ramos , A. Vigneron-Tenorio

We consider certain categorical structures that are implicit in subfactor theory. Making the connection between subfactor theory (at finite index) and category theory explicit sheds light on both subjects. Furthermore, it allows various…

Category Theory · Mathematics 2007-05-23 Michael Mueger

In this paper we study those submonoids of $\mathbb{N}^d$ which a non-trivial pseudo-Frobenius set. In the affine case, we prove that they are the affine semigroups whose associated algebra over a field has maximal projective dimension…

Commutative Algebra · Mathematics 2019-03-27 J. I. García-García , I. Ojeda , J. C. Rosales , A. Vigneron-Tenorio

We introduce two families of diagrammatic monoidal supercategories. The first family, depending on an associative superalgebra, generalizes the oriented Brauer category. The second, depending on an involutive superalgebra, generalizes the…

Representation Theory · Mathematics 2025-06-13 Saima Samchuck-Schnarch , Alistair Savage

This paper introduces type P web supercategories. They are defined as diagrammatic monoidal $k$-linear supercategories via generators and relations. We study the structure of these categories and provide diagrammatic bases for their…

Representation Theory · Mathematics 2024-11-20 Nicholas Davidson , Jonathan R. Kujawa , Robert Muth

To any Frobenius superalgebra $A$ we associate an oriented Frobenius Brauer category and an affine oriented Frobenius Brauer category. We define natural actions of these categories on categories of supermodules for general linear Lie…

Representation Theory · Mathematics 2025-05-14 Alexandra McSween , Alistair Savage

A functor of sets $\mathbb X$ over the category of $K$-commutative algebras is said to be an affine functor if its functor of functions, $\mathbb A_{\mathbb X}$, is reflexive and $\mathbb X=\Spec \mathbb A_{\mathbb X}$. We prove that affine…

Algebraic Geometry · Mathematics 2012-05-08 J. Navarro , C. Sancho , P. Sancho

We define and study two new classes of algebras, called higher-level affine wreath product algebras and higher-level affine Frobenius Hecke algebras. They depend on a Frobenius superalgebra and are defined, respectively, as path algebras of…

Representation Theory · Mathematics 2026-05-07 Thomas Moran
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