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We investigate the Brauer class of the endomorphism algebra of the motive attached to a non-CM form. The ramification of the algebra is shown in many cases to be controlled by the normalized slopes of the form.

Number Theory · Mathematics 2026-02-17 Enrique González-Jiménez , Eknath Ghate , Jordi Quer

We construct a cellular basis of the walled Brauer algebra which has similar properties as the Murphy basis of the group algebra of the symmetric group. In particular, the restriction of a cell module to a certain subalgebra can be easily…

Representation Theory · Mathematics 2014-08-29 Friederike Stoll , Mathias Werth

In this paper, we mainly study structure of multiplicative simple Hom-Jordan algebras. We talk about equivalent conditions for multiplicative Hom-Jordan algebras being solvable, simple and semi-simple. As an application, we give a theorem…

Rings and Algebras · Mathematics 2020-03-09 Chenrui Yao , Yao Ma , Liangyun Chen

This paper introduces the notion of Brauer-friendly modules, a generalisation of endo-p-permutation modules. A module over a block algebra OGe is said to be Brauer-friendly if it is a direct sum of indecomposable modules with compatible…

Representation Theory · Mathematics 2013-07-16 Erwan Biland

The restriction of a (dual) Specht module to a smaller symmetric group has a filtration by (dual) Specht modules of this smaller group. In the cellular structure of the group algebra of the symmetric group, the cell modules are exactly the…

Representation Theory · Mathematics 2019-04-24 Inga Paul

In this paper, we provide a diagrammatic approach to study the branching rules for cell modules on a sequence of walled Brauer algebras. This also allows us to calculate the structure constants of multiplication over the Grothendieck ring…

Representation Theory · Mathematics 2020-12-22 Pei Wang , Yanbo Li

The paper studies the structure of restricted Leibniz algebras. More specifically speaking, we first give the equivalent definition of restricted Leibniz algebras, which is by far more tractable than that of a restricted Leibniz algebras in…

Rings and Algebras · Mathematics 2014-04-01 Baoling Guan , Liangyun Chen

A new basis of the $q$-Brauer algebra is introduced, which is a lift of Murphy bases of Hecke algebras of symmetric groups. This basis is a cellular basis in the sense of Graham and Lehrer. Subsequently, using combinatorial language we…

Representation Theory · Mathematics 2013-09-16 Dung Tien Nguyen

We consider simple modules over the McConnell--Pettit algebras. We show that both induction and contraction yield simple modules for the extremes of the global dimension.

Rings and Algebras · Mathematics 2011-06-23 Ashish Gupta

A construction of bases for cell modules of the Birman--Murakami--Wenzl (or B--M--W) algebra $B_n(q,r)$ by lifting bases for cell modules of $B_{n-1}(q,r)$ is given. By iterating this procedure, we produce cellular bases for B--M--W…

Representation Theory · Mathematics 2007-05-30 John Enyang

We develop a structure theory for two classes of infinite dimensional modules over tame hereditary algebras: the Baer modules, and the Mittag-Leffler ones.

Rings and Algebras · Mathematics 2007-06-05 Lidia Angeleri-Hugel , Dolors Herbera , Jan Trlifaj

In this article, we study the multiparameter second quantum Weyl algebra at roots of unity. In this setting, the algebra is a polynomial identity (PI) algebra, and the dimension of its simple modules is bounded above by its PI degree. We…

Representation Theory · Mathematics 2024-12-24 Sanu Bera

In the present paper, a class of new simple modules over the $N=1$ Ramond algebra are constructed, which are induced from simple modules over some finite dimensional solvable Lie superalgebras. These new modules are simple restricted…

Quantum Algebra · Mathematics 2023-02-08 Haibo Chen

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

In this work we describe all simple modules over Leavitt path algebras as induced modules from irreducible representations of the isotropy groups.

Rings and Algebras · Mathematics 2020-01-17 Nguyen Bich Van

In this paper, as the first step towards classification of simple weight modules with finite dimensional weight spaces over Witt algebras $W_n$, we explicitly describe supports of such modules. We also obtain some descriptions on the…

Representation Theory · Mathematics 2009-06-05 Volodymyr Mazorchuk , Kaiming Zhao

For each natural number n greater than 1, we define an algebra satisfying many properties that one might expect to hold for a Brauer algebra of type Cn. The monomials of this algebra correspond to scalar multiples of symmetric Brauer…

Representation Theory · Mathematics 2015-03-17 Arjeh M. Cohen , Shoumin Liu , Shona Yu

In this paper we consider the $q$-Brauer algebra over $R$ a commutative noetherian domain. We first construct a new basis for $q$-Brauer algebras, and we then prove that it is a cell basis, and thus these algebras are cellular in the sense…

Representation Theory · Mathematics 2013-09-19 Dung Tien Nguyen

For any grading by an abelian group $G$ on the exceptional simple Lie algebra $\mathcal{L}$ of type $E_6$ or $E_7$ over an algebraically closed field of characteristic zero, we compute the graded Brauer invariants of simple…

Representation Theory · Mathematics 2017-11-27 Cristina Draper , Alberto Elduque , Mikhail Kochetov

We construct a normal form for the walled Brauer algebra, together with the reduction algorithm. We apply normal form to calculate the numbers of monomials in generators with minimal length. We further utilize normal form to give explicit…

Representation Theory · Mathematics 2020-01-01 D. Bulgakova , Y. Goncharov , O. Ogievetsky