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The classical Tits construction of the exceptional simple Lie algebras has been extended in a couple of directions by using either Jordan superalgebras or composition superalgebras. These extensions are reviewed here. The outcome has been…

Rings and Algebras · Mathematics 2009-07-23 Alberto Elduque

Symplectic (respectively orthogonal) triple systems provide constructions of Lie algebras (resp. superalgebras). However, in characteristic 3, it is shown that this role can be interchanged and that Lie superalgebras (resp. algebras) can be…

Rings and Algebras · Mathematics 2007-05-23 Alberto Elduque

Over algebraically closed fields of characteristic p>2, prolongations of the simple finite dimensional Lie algebras and Lie superalgebras with Cartan matrix are studied for certain simplest gradings of these algebras. Several new simple Lie…

Representation Theory · Mathematics 2009-06-24 Sofiane Bouarroudj , Pavel Grozman , Dimitry Leites

The classical Tits construction provides models of the exceptional simple Lie algebras in terms of a unital composition algebra and a degree three simple Jordan algebra. A couple of actions of the symmetric group of degree 4 on this…

Rings and Algebras · Mathematics 2007-05-23 Alberto Elduque , Susumu Okubo

Models of the exceptional simple modular Lie superalgebras in characteristic $p\geq 3$, that have appeared in the classification due to Bouarroudj, Grozman and Leites of the Lie superalgebras with indecomposable symmetrizable Cartan…

Rings and Algebras · Mathematics 2008-05-12 Alberto Elduque

Kac's ten-dimensional simple Jordan superalgebra over a field of characteristic 5 is obtained from a process of semisimplification, via tensor categories, from the exceptional simple Jordan algebra (or Albert algebra), together with a…

Rings and Algebras · Mathematics 2024-12-13 Alberto Elduque , Pavel Etingof , Arun S. Kannan

Some simple Lie superalgebras, specific of characteristic 3, defined by S. Bouarroudj and D. Leites, are shown to be related to the simple alternative and commutative superalgebras discovered by I.P. Shestakov.

Rings and Algebras · Mathematics 2007-05-23 Alberto Elduque

We describe certain almost-simple algebraic supergroups over an algebraically closed field of odd or zero characteristic. In addition to supergroups with simple Lie superalgebras from Kac's theorem, we construct new supergroups whose Lie…

Rings and Algebras · Mathematics 2025-11-21 S. Bouarroudj , A. N. Zubkov

A Lie superalgebra is attached to any finite-dimensional J-ternary algebra over an algebraically closed field of characteristic 3, using a process of semisimplification via tensor categories. Some of the exceptional simple Lie algebras,…

Rings and Algebras · Mathematics 2026-03-13 Isabel Cunha , Alberto Elduque

Finite dimensional modular Lie superalgebras over algebraically closed fields with indecomposable Cartan matrices are classified under some technical, most probably inessential, hypotheses. If the Cartan matrix is invertible, the…

Representation Theory · Mathematics 2009-06-11 Sofiane Bouarroudj , Pavel Grozman , Dimitry Leites

A way to construct (conjecturally all) simple finite dimensional modular Lie (super)algebras over algebraically closed fields of characteristic not 2 is offered. In characteristic 2, the method is supposed to give only simple Lie…

Representation Theory · Mathematics 2007-10-31 Dimitry Leites

The Frank Lie algebras are simple Lie algebras that only occur over fields of characteristic 3. These come equipped with distinguished inner derivations that make them algebras in the category $\textbf{Rep}(\alpha_3)$. We apply the…

Rings and Algebras · Mathematics 2026-02-18 Michiel Smet

Recently Alberto Elduque listed all simple and graded modulo 2 finite dimensional Lie algebras and superalgebras whose odd component is the spinor representation of the orthogonal Lie algebra equal to the even component, and discovered one…

Representation Theory · Mathematics 2007-05-23 Sofiane Bouarroudj , Pavel Grozman , Dimitry Leites

This paper is a further contribution to the extensive study by a number of authors of the subalgebra lattice of a Lie algebra. It is shown that, in certain circumstances, including for all solvable algebras, for all Lie algebras over…

Rings and Algebras · Mathematics 2008-06-19 David A. Towers

The five simple exceptional complex Lie superalgbras of vector fields are described. One of them is new; the other four are explicitely described for the first time. All of the exceptional Lie superalgebras are obtained with the help of the…

High Energy Physics - Theory · Physics 2007-05-23 Irina Shchepochkina

We overview the classifications of simple finite-dimensional modular Lie algebras. In characteristic 2, their list is wider than that in other characteristics; e.g., it contains desuperizations of modular analogs of complex simple vectorial…

Representation Theory · Mathematics 2024-09-17 Sofiane Bouarroudj , Pavel Grozman , Alexei Lebedev , Dimitry Leites , Irina Shchepochkina

Over algebraically closed fields of positive characteristic, for simple Lie (super)algebras, and certain Lie (super)algebras close to simple ones, with symmetric root systems (such that for each root, there is minus it of the same…

Representation Theory · Mathematics 2024-09-17 Sofiane Bouarroudj , Pavel Grozman , Alexei Lebedev , Dimitry Leites

Motivated by the recent progress towards classification of simple finite-dimensional Lie algebras over an algebraically closed field of characteristic $2$, we investigate such $15$-dimensional algebras.

Rings and Algebras · Mathematics 2021-04-06 Alexander Grishkov , Henrique Guzzo , Marina Rasskazova , Pasha Zusmanovich

In this paper, we study Lie superalgebras of $2\times 2$ matrix-valued first-order differential operators on the complex line. We first completely classify all such superalgebras of finite dimension. Among the finite-dimensional…

Mathematical Physics · Physics 2016-08-15 Federico Finkel , Artemio González-López , Miguel A. Rodríguez

Recently, the classical Freudenthal Magic Square has been extended over fields of characteristic 3 with two more rows and columns filled with (mostly simple) Lie superalgebras specific of this characteristic. This Supermagic Square will be…

Rings and Algebras · Mathematics 2008-02-25 Isabel Cunha , Alberto Elduque
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