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We show that a faithful projective-injective module over a finite-dimensional algebra $A$ has the double centraliser property if and only if $A$ as a bimodule is reflexive. More generally, we provide a new characterisation of the classical…

Representation Theory · Mathematics 2025-08-27 Tiago Cruz , René Marczinzik

We use folding techniques to define a new class of gentle-like algebras that generalise the iterated tilted algebras of type $C$ and $\widetilde{C}$, which we call folded gentle algebras. We then show that folded gentle algebras satisfy…

Representation Theory · Mathematics 2025-03-28 Drew Damien Duffield

Gendo-Frobenius algebras are a common generalisation of Frobenius algebras and of gendo-symmetric algebras. A comultiplication is constructed for gendo-Frobenius algebras, which specialises to the known comultiplications on Frobenius and on…

Representation Theory · Mathematics 2021-07-30 Çiğdem Yırtıcı

For a fixed finite dimensional algebra $A$, we study representation embeddings of the form $mod(B)\rightarrow mod(A)$. Such an embedding is called homological, if it induces an isomorphism on all Ext-groups and weakly homological, if only…

Representation Theory · Mathematics 2015-12-09 Frederik Marks

We complete a classification of the two-vertex geometrically irreducible algebras. We also classify the algebras in new classes of hom- and ext-irreducible algebras.

Representation Theory · Mathematics 2024-05-08 Grzegorz Bobinski , Grzegorz Zwara

We consider a natural generalisation of symmetric Nakayama algebras, namely, symmetric special biserial algebras with at most one non-uniserial indecomposable projective module. We describe the basic algebras explicitly by quiver and…

Representation Theory · Mathematics 2013-10-14 Nicole Snashall , Rachel Taillefer

We realize the enveloping algebra of the positive part of a semisimple complex Lie algebra as a convolution algebra of constructible functions on module varieties of some Iwanaga-Gorenstein algebras of dimension 1.

Representation Theory · Mathematics 2016-10-25 Christof Geiss , Bernard Leclerc , Jan Schröer

In this work, we introduce a new class of algebras called skew-Brauer graph algebras, which generalize the well-known Brauer graph algebras. We establish that skew-Brauer graph algebras are symmetric and can be defined using a Brauer graph…

Representation Theory · Mathematics 2025-11-24 Ana García Elsener , Victoria Guazzelli , Yadira Valdivieso

We clarify how mirror symmetry acts on 3d theories with N=2,3 or 4 supersymmetries and non-abelian Chern-Simons terms and then construct many new examples. We identify a new duality, geometric duality, that allows us to generate large…

High Energy Physics - Theory · Physics 2009-09-28 Kristan Jensen , Andreas Karch

The so-called Takahashi's \emph{Inversion Theorem}, the reconstruction of a given spinor based on its bilinear covariants, are re-examined, considering alternative dual structures. In contrast to the classical results, where the Dirac dual…

High Energy Physics - Theory · Physics 2023-07-27 R. J. Bueno Rogerio , R. T. Cavalcanti , J. M. Hoff da Silva , C. H. Coronado Villalobos

In this paper, by using Gr\"obner-Shirshov bases, we show that in the following classes, each (resp. countably generated) algebra can be embedded into a simple (resp. two-generated) algebra: associative differential algebras, associative…

Rings and Algebras · Mathematics 2011-06-14 L. A. Bokut , Yuqun Chen , Qiuhui Mo

Lie admissible algebra structures, called center-symmetric algebras, are defined. Main properties and algebraic consequences are derived and discussed. Bimodules are given and used to build a center-symmetric algebra on the direct sum of…

Rings and Algebras · Mathematics 2015-07-29 Mahouton Norbert Hounkonnou , Mafoya Landry Dassoundo

Gendo-symmetric algebras were recently introduced by Fang and K\"onig. An algebra is called gendo-symmetric in case it is isomorphic to the endomorphism ring of a generator over a finite dimensional symmetric algebra. We show that a finite…

Representation Theory · Mathematics 2016-08-08 Rene Marczinzik

We prove the Landau-Ginzburg Mirror Symmetry Conjecture at the level of (orbifolded) Frobenius algebras for a large class of invertible singularities, including arbitrary sums of loops and Fermats with arbitrary symmetry groups.…

Algebraic Geometry · Mathematics 2011-11-11 Amanda Francis , Tyler Jarvis , Drew Johnson , Rachel Suggs

We formulate and prove the Remodeling Conjecture with descendants, which is a version of all-genus equivariant descendant mirror symmetry for semi-projective toric Calabi-Yau 3-orbifolds with integral structures. We construct an isomorphism…

Algebraic Geometry · Mathematics 2025-12-25 Bohan Fang , Chiu-Chu Melissa Liu , Song Yu , Zhengyu Zong

In this work we study Leibniz algebras whose second-maximal subalgebras are ideals. We provide a classification based on solvability, nilpotency, and the size of the derived algebra. We give specific descriptions of those Leibniz algebras…

Rings and Algebras · Mathematics 2020-02-12 Lindsey Bosko-Dunbar , Jonathan Dunbar , J. T. Hird , Kristen Stagg

This article provides a complete description of the differential Gerstenhaber algebras of all nilpotent complex structures on any real six-dimensional nilpotent algebra. As an application, we classify all pseudo-K\"ahlerian complex…

Algebraic Geometry · Mathematics 2007-10-20 Richard Cleyton , Yat Sun Poon

We classify topological insulators and superconductors in the presence of additional symmetries such as reflection or mirror symmetries. For each member of the 10 Altland-Zirnbauer symmetry classes, we have a Clifford algebra defined by…

Mesoscale and Nanoscale Physics · Physics 2013-10-07 Takahiro Morimoto , Akira Furusaki

Using tools from the geometry of Einstein solvmanifolds, we give a geometric argument that a semi-simple Lie algebra (of non-compact type) is completely determined by its Iwasawa subalgebra. Furthermore, we produce an algebraic procedure…

Representation Theory · Mathematics 2024-01-19 Jonathan Epstein , Michael Jablonski

The goal of this paper is to make the vertex operator algebra approach to mirror symmetry accessible to algebraic geometers. Compared to better-known approaches using moduli spaces of stable maps and special Lagrangian fibrations, this…

Algebraic Geometry · Mathematics 2007-05-23 Lev A. Borisov