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A description of group automorphisms of all two-dimensional algebras, considered up to isomorphism, over any basic field is provided.

Rings and Algebras · Mathematics 2024-11-19 Sh. Eshmirzayev , U. Bekbaev

We construct 2 families of automorphic forms related to twisted fake monster algebras and calculate their Fourier expansions. This gives a new proof of their denominator identities and shows that they define automorphic forms of singular…

Quantum Algebra · Mathematics 2016-09-07 Nils R. Scheithauer

We study automorphic Lie algebras and their applications to integrable systems. Automorphic Lie algebras are a natural generalisation of celebrated Kac-Moody algebras to the case when the group of automorphisms is not cyclic. They are…

Exactly Solvable and Integrable Systems · Physics 2020-10-23 Rhys T. Bury , Alexander V. Mikhailov

Let $\mathcal{J}^1$ be the real form of complex simple Jordan algebra with the automorphism group $G$ of type $F_{4(-20)}$. Explicitly, we give the orbit decomposition of $\mathcal{J}^1$ under the action of $G$ and determine the Lie group…

Differential Geometry · Mathematics 2012-07-10 Akihiro Nishio

We describe poles and the corresponding residual automorphic representations of Eisenstein series attached to maximal parabolic subgroups whose unipotent radicals admit Jordan algebra structure.

Representation Theory · Mathematics 2020-02-19 Marcela Hanzer , Gordan Savin

We study the automorphism group of an idempotent evolution algebra, show that any finite group can be the automorphism group of an evolution algebra, and describe certain evolution algebras with given automorphism groups. In particular, we…

Rings and Algebras · Mathematics 2022-02-15 Songpon Sriwongsa , Yi Ming Zou

We define a subgroup of the universal sofic group, obtained as the normaliser of a separable abelian subalgebra. This subgroup can be obtained as an extension by the group of automorphisms on a standard probability space. We show that each…

Functional Analysis · Mathematics 2019-11-06 Matteo Cavaleri , Radu B. Munteanu , Liviu Paunescu

We define regular Kac-Moody superalgebras and classify them using integrable modules. We give conditions for irreducible highest weight modules of regular Kac-Moody superalgebras to be integrable. This paper is a major part of the proof for…

Representation Theory · Mathematics 2010-11-08 Crystal Hoyt

In this paper, we determine derivations of Borel subalgebras and their derived subalgebras called nilradicals, in Kac-Moody algebras (and contragredient Lie algebras) over any field of characteristic 0; and we also determine automorphisms…

Rings and Algebras · Mathematics 2013-01-04 Jun Morita , Kaiming Zhao

We outline a new approach to classify real forms and automorphisms of finite order of affine Kac-Moody algebras.

Rings and Algebras · Mathematics 2007-12-17 Ernst Heintze

The maximal graded subalgebras for four families of Lie superalgebras of Cartan type over a field of prime characteristic are studied. All maximal reducible graded subalgebras are described completely and their isomorphism classes,…

Rings and Algebras · Mathematics 2018-07-25 Wei Bai , Wende Liu , Xuan Liu , Hayk Melikyan

In this paper, we investigate the supercategories consisting of supermodules over quiver Hecke superalgebras and cyclotomic quiver Hecke superalgebras. We prove that these supercategories provide a supercategorification of a certain family…

Representation Theory · Mathematics 2013-07-10 Seok-Jin Kang , Masaki Kashiwara , Se-jin Oh

We describe degenerations of three-dimensional Jordan superalgebras over $\mathbb{C}$. In particular, we describe all irreducible components in the corresponding varieties.

Rings and Algebras · Mathematics 2020-04-03 María Alejandra Alvarez , Isabel Hernández , Ivan Kaygorodov

We describe the group of continuous automorphisms of all simple infinite-dimensional linearly compact Lie superalgebras and use it in order to classify F-forms of these superalgebras over any field F of characteristic zero.

Quantum Algebra · Mathematics 2015-06-26 Nicoletta Cantarini , Victor G. Kac

In this paper we extend several results about root systems of Kac-Moody algebras to superalgebra context. In particular, we describe the root bases and the sets of imaginary roots.

Representation Theory · Mathematics 2024-03-05 Maria Gorelik , Shay Kinamon Kerbis

This paper is devoted to a study of the automorphism groups of three series of finite dimensional special odd Hamiltonian superalgebras $\mathfrak{g}$ over a field of prime characteristic. Our aim is to characterize the connections between…

Rings and Algebras · Mathematics 2013-04-25 Liming Tang , Wende Liu

We give a classification of maximal elements of the set of finite groups that can be realized as the full automorphism groups of simple polarized abelian fourfolds over finite fields. As an application, we compute the Jordan constants of…

Number Theory · Mathematics 2021-06-22 WonTae Hwang

In this paper, we give the definition of the generalized Ramond N=2 superconformal algebras and discuss the derivation algebra and the automorphism group

Representation Theory · Mathematics 2008-11-21 Jiayuan Fu , Yongcun Gao

We investigate automorphism groups of planar graphs. The main result is a complete recursive description of all abstract groups that can be realized as automorphism groups of planar graphs. The characterization is formulated in terms of…

Combinatorics · Mathematics 2021-02-08 Pavel Klavík , Roman Nedela , Peter Zeman

Given a variety of universal algebras. A method is suggested for describing automorphisms of a category of free algebras of this variety. Applying this general method all automorphisms of such categories are found in two cases: 1) for the…

Rings and Algebras · Mathematics 2007-05-23 Boris Plotkin , Grigori Zhitomirski