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Transformation coefficients between standard bases for irreducible representations of the Brauer centralizer algebra $\mathfrak{B}_f(x)$ and split bases adapted to the $\mathfrak{B}_{f_1} (x) \times \mathfrak{B}_{f_2} (x) \subset…

Mathematical Physics · Physics 2008-11-26 Vincenzo Chilla

We prove that Toen's secondary Grothendieck ring is isomorphic to the Grothendieck ring of smooth proper pretriangulated dg categories previously introduced by Bondal, Larsen and Lunts. Along the way, we show that those short exact…

K-Theory and Homology · Mathematics 2016-02-08 Goncalo Tabuada

We put forward a conjecture for the leading constant in Malle's conjecture on number fields of bounded discriminant, guided by stacky versions of conjectures of Batyrev-Manin, Batyrev-Tschinkel, and Peyre on rational points of bounded…

Number Theory · Mathematics 2025-06-25 Daniel Loughran , Tim Santens

An associative central simple algebra is a form of matrices, because a maximal \'{e}tale subalgebra acts on the algebra faithfully by left and right multiplication. In an attempt to extract and isolate the full potential of this point of…

Rings and Algebras · Mathematics 2023-12-11 Guy Blachar , Darrell Haile , Eliyahu Matzri , Edan Rein , Uzi Vishne

We use the definition of differential operators on noncommutative rings given by V.Lunts and A.Rosenberg to find the differential operators on Azumaya algebras and the Heisenberg algebras.

Algebraic Geometry · Mathematics 2007-05-23 Uma Iyer

We give a formula for the cohomological invariants of a root stack, which we apply to compute the cohomological invariants and the Brauer group of the stack of admissible double coverings.

Algebraic Geometry · Mathematics 2020-10-22 Andrea Di Lorenzo , Roberto Pirisi

In this paper, we will define the Brauer algebras of Weyl types, and describe some propositions of these algebras. Especially, we prove the result of type $G_2$ to accomplish our project of Brauer algebras of non-simply laced types.

Representation Theory · Mathematics 2015-03-09 Shoumin Liu

We describe isomorphisms between strongly triangular matrix rings that were defined earlier in Berkenmeier et al. (2000) as ones having a complete set of triangulating idempotents, and we show that the so-called triangulating idempotents…

Rings and Algebras · Mathematics 2012-10-18 P. N. Anh , L. van Wyk

We look at classes of semiassociative algebras, with an emphasis on those that canonically generalize associative (generalized) cyclic algebras, and at their behaviour in the semiassociative Brauer monoid defined by Blachar, Haile, Matzri,…

Rings and Algebras · Mathematics 2024-07-15 S Pumpluen

In this paper the class of Brauer graph algebras is proved to be closed under derived equivalence. For that we use the rank of the maximal torus of the identity component $Out^0(A)$ of the group of outer automorphisms of a symmetric stably…

Representation Theory · Mathematics 2021-11-30 Mikhail Antipov , Alexandra Zvonareva

We offer a solution to the long-standing problem of group completing within the context of rig categories (also known as bimonoidal categories). Given a rig category R we construct a natural additive group completion R' that retains the…

K-Theory and Homology · Mathematics 2022-06-22 Nils A. Baas , Bjorn Ian Dundas , Birgit Richter , John Rognes

Non-commutative Poisson algebras are the algebras having an associative algebra structure and a Lie algebra structure together with the Leibniz law. Let $P$ be a non-commutative Poisson algebra over some algebraically closed field of…

Rings and Algebras · Mathematics 2025-03-18 Zhennan Pan , Gang Han

In this paper homological ideals associated to some Nakayama algebras are characterized and enumerated via integer specializations of some suitable Brauer configuration algebras. Besides, it is shown how the number of such homological…

Representation Theory · Mathematics 2021-04-02 Pedro Fernando Fernández Espinosa , Agustín Moreno Cañadas

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 present a method for calculating the Brauer group of a surface given by a diagonal equation in the projective space. For diagonal quartic surfaces with coefficients in Q we determine the Brauer groups over Q and Q(i).

Algebraic Geometry · Mathematics 2023-05-22 Damián Gvirtz-Chen , Alexei N. Skorobogatov

The aim of this paper is to investigate the birational geometry of Generalized Severi-Brauer varieties. A conjecture of Amitsur states that two Severi-Brauer varieties $V(A)$ and $V(B)$ are birational if the underlying central simple…

Rings and Algebras · Mathematics 2007-05-23 Daniel Krashen

For a smooth variety $X$ over an algebraically closed field of characteristic $p$, to a differential 1-form $\alpha$ on the Frobenius twist $X^{(1)}$ one can associate an Azumaya algebra $\mathcal D_{X,\alpha}$, defined as a certain central…

Algebraic Geometry · Mathematics 2019-10-31 Dmitry Kubrak , Roman Travkin

The Birman-Murakami-Wenzl algebra (BMW algebra) of type Dn is shown to be semisimple and free of rank (2^n+1)n!!-(2^(n-1)+1)n! over a specified commutative ring R, where n!! is the product of the first n odd integers. We also show it is a…

Representation Theory · Mathematics 2011-05-03 Arjeh M. Cohen , D. A. H. Gijsbers , David B. Wales

Split preorders are preordering relations on a domain whose composition is defined in a particular way by splitting the domain into two disjoint subsets. These relations and the associated composition arise in categorial proof theory in…

Logic · Mathematics 2009-01-30 K. Dosen , Z. Petric

For a smooth proper variety over a $p$-adic field, the Brauer group and abelian fundamental group are related to the higher Chow groups by the Brauer-Manin pairing and the class field theory. We generalize this relation to smooth (possibly…

Number Theory · Mathematics 2015-01-14 Takao Yamazaki