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We realize (via an explicit isomorphism) the walled Brauer algebra for an arbitrary integral parameter delta as an idempotent truncation of a level two cyclotomic degenerate affine walled Brauer algebra. The latter arises naturally in Lie…

Representation Theory · Mathematics 2015-06-18 Antonio Sartori , Catharina Stroppel

We prove that the Brauer algebra, for all parameters for which it is quasi-hereditary, is Ringel dual to a category of representations of the orthosymplectic super group. As a consequence we obtain new and algebraic proofs for some results…

Representation Theory · Mathematics 2019-04-02 Kevin Coulembier

In a previous work we established a super Schur-Weyl-Brauer duality between the orthosymplectic supergroup of superdimension $(m|2n)$ and the Brauer algebra with parameter $m-2n$. This led to a proof of the first fundamental theorem of…

Representation Theory · Mathematics 2014-07-07 G. I. Lehrer , R. B. Zhang

We establish a correspondence between Young diagrams and differential operators of infinitely many variables. These operators form a commutative associative algebra isomorphic to the algebra of the conjugated classes of finite permutations…

Geometric Topology · Mathematics 2015-05-20 A. Mironov , A. Morozov , S. Natanzon

We present an efficient computational representation of central simple algebras using Brauer factor sets. Using this representation and polynomial quantum algorithms for number theoretical tasks such as factoring and $S$-unit group…

Number Theory · Mathematics 2024-07-30 Péter Kutas , Mickaël Montessinos

The centralizer algebra of the action of the unitary group on the real tensor powers of its natural module, is described by means of a modification in the multiplication of the signed Brauer algebras. The relationships of this algebra with…

Representation Theory · Mathematics 2016-09-07 Alberto Elduque

Using an analogy between the Brauer groups in algebra and the Whitehead groups in topology, we first use methods of algebraic K-theory to give a natural definition of Brauer spectra for commutative rings, such that their homotopy groups are…

K-Theory and Homology · Mathematics 2016-12-30 Markus Szymik

We prove Schur--Weyl duality between the Brauer algebra $\mathfrak{B}_n(m)$ and the orthogonal group $O_{m}(K)$ over an arbitrary infinite field $K$ of odd characteristic. If $m$ is even, we show that each connected component of the…

Representation Theory · Mathematics 2014-02-26 Stephen Doty , Jun Hu

Any multiplicity-free family of finite dimensional algebras has a canonical complete set of of pairwise orthogonal primitive idempotents in each level. We give various methods to compute these idempotents. In the case of symmetric group…

Representation Theory · Mathematics 2019-06-10 Stephen Doty , Aaron Lauve , George H. Seelinger

Brauer graph algebras form a classical class of symmetric algebras with well-structured combinatorial properties and geometric models. Recently, they have been generalized to biserial fractional Brauer graph algebras, which can be regarded…

Representation Theory · Mathematics 2026-05-28 Bohan Xing

We determine the blocks of the walled Brauer algebra in characteristic zero. These can be described in terms of orbits of the action of a Weyl group of type $A$ on a certain set of weights. In positive characteristic we give a linkage…

Representation Theory · Mathematics 2007-09-07 Anton Cox , Maud De Visscher , Stephen Doty , Paul Martin

In the first part of the article we introduce $C^*$-algebras associated to self-similar groups and study their properties and relations to known algebras. The algebras are constructed as sub-algebras of the Cuntz-Pimsner algebra (and its…

Group Theory · Mathematics 2007-05-23 Rostislav Grigorchuk , Volodymyr Nekrashevych

Let $G$ be an adjoint algebraic group of type $B$, $C$, or $D$ over an algebraically closed field of characteristic 2. We construct a Springer correspondence for the Lie algebra of $G$. In particular, for orthogonal Lie algebras in…

Representation Theory · Mathematics 2018-05-25 Ting Xue

We prove that the class of Brauer graph algebras coincides with the class of indecomposable idempotent algebras of biserial weighted surface algebras. These algebras are associated to triangulated surfaces with arbitrarily oriented…

Representation Theory · Mathematics 2018-08-23 Karin Erdmann , Andrzej Skowroński

A category of Brauer diagrams, analogous to Turaev's tangle category, is introduced, and a presentation of the category is given; specifically, we prove that seven relations among its four generating homomorphisms suffice to deduce all…

Group Theory · Mathematics 2012-07-26 G. I. Lehrer , R. B. Zhang

In this paper, we will compute the characteristic polynomials for finite dimensional representations of classical complex Lie algebras and the exceptional Lie algebra of type G2, which can be obtained through the orbits of integral weights…

Representation Theory · Mathematics 2024-10-28 Chenyue Feng , Shoumin Liu , Xumin Wang

This note is a sequel to Shu-Xue-Yao's paper \cite{BYY} where the author studied the so-called enhanced groups and related dualities for type $A$. In this note, we continue to investigate the enhanced dualities for classical groups of type…

Representation Theory · Mathematics 2021-11-17 Bin Liu

We compute the Brauer group of the moduli stack of elliptic curves over the integers, localizations of the integers, finite fields of odd characteristic, and algebraically closed fields of characteristic not $2$. The methods involved…

Algebraic Geometry · Mathematics 2020-10-21 Benjamin Antieau , Lennart Meier

We study the representation theory of the rook-Brauer algebra RB_k(x), also called the partial Brauer algebra. This algebra has a basis of "rook-Brauer" diagrams, which are Brauer diagrams that allow for the possibility of missing edges.…

Representation Theory · Mathematics 2012-07-26 Elise delMas , Tom Halverson

In this paper we establish a connection between ribbon graphs and Brauer graphs. As a result, we show that a compact oriented surface with marked points gives rise to a unique Brauer graph algebra up to derived equivalence. In the case of a…

Representation Theory · Mathematics 2020-12-21 Bethany Marsh , Sibylle Schroll