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We classify the nilpotent Lie algebras of real dimension eight and minimal center that admit a complex structure. Furthermore, for every such nilpotent Lie algebra $\mathfrak{g}$, we describe the space of complex structures on…

Rings and Algebras · Mathematics 2022-03-17 Adela Latorre , Luis Ugarte , Raquel Villacampa

We study nilpotent Lie algebras endowed with a complex structure and a quadratic structure which is pseudo-Hermitian for the given complex structure. We propose several methods to construct such Lie algebras and describe a method of double…

Rings and Algebras · Mathematics 2023-01-18 Mustapha Bachaou , Ignacio Bajo , Mohamed Louzari

In this paper, we classify eight-dimensional non-solvable Lie algebras that support a symplectic structure. As well as a complete classification is given, up to symplectomorphism, of eight-dimensional symplectic non-solvable Lie algebras.

Symplectic Geometry · Mathematics 2023-05-23 T. Aït Aissa , M. W. Mansouri

We analyze symplectic forms on six dimensional real solvable and non-nilpotent Lie algebras. More precisely, we obtain all those algebras endowed with a symplectic form that decompose as the direct sum of two ideals or are indecomposable…

Differential Geometry · Mathematics 2007-05-23 R. Campoamor-Stursberg

In this paper, we study 4-dimensional nilpotent complex associative algebras. This is a continuation of the study of the moduli space of 4-dimensional algebras. The non-nilpotent algeras were analyzed in an earlier paper. Even though there…

Rings and Algebras · Mathematics 2013-09-24 Alice Fialowski , Michael Penkava

We present algebraic and geometric classifications of the $4$-dimensional complex nilpotent right alternative algebras. Specifically, we find that, up to isomorphism, there are only $9$ non-isomorphic nontrivial nilpotent right alternative…

Rings and Algebras · Mathematics 2021-11-02 Nurlan Ismailov , Ivan Kaygorodov , Manat Mustafa

In this paper we classify filiform associative algebras of degree $k$ over a field of characteristic zero. Moreover, we also classify naturally graded complex filiform and quasi-filiform nilpotent associative algebras which are described by…

Rings and Algebras · Mathematics 2018-08-21 Ikboljon A. Karimjanov , Manuel Ladra

This paper is devoted to the complete algebraic classification of complex $5$-dimensional nilpotent commutative algebras. Our method of classification is based on the standard method of classification of central extensions of smaller…

Rings and Algebras · Mathematics 2022-04-04 Doston Jumaniyozov , Ivan Kaygorodov , Abror Khudoyberdiyev

We classify the $4$-dimensional nilpotent bicommutative algebras over $\mathbb C$ from both algebraic and geometric approaches.

Rings and Algebras · Mathematics 2020-04-03 Ivan Kaygorodov , María Pilar Paez Guillán , Vasily Voronin

The paper is devoted to the study of annihilator extensions of evolution algebras and suggests an approach to classify finite-dimensional nilpotent evolution algebras. Subsequently nilpotent evolution algebras of dimension up to four are…

Commutative Algebra · Mathematics 2015-08-31 A. S. Hegazi , Hani Abdelwahab

The present article is part of a research program the aim of which is to find all indecomposable solvable extensions of a given class of nilpotent Lie algebras. Specifically in this article we consider a nilpotent Lie algebra n that is…

Mathematical Physics · Physics 2012-03-14 Libor Snobl , Pavel Winternitz

There are normal sub-blocks of nilpotent blocks which are NOT nilpotent or, equivalently, nilpotent extensions of non-nilpotent blocks. In this paper we determine the source algebra structure of the non-nilpotent blocks involved in these…

Group Theory · Mathematics 2010-04-12 Lluis Puig

We illustrate an algorithm to classify nice nilpotent Lie algebras of dimension $n$ up to a suitable notion of equivalence; applying the algorithm, we obtain complete listings for $n\leq9$. On every nilpotent Lie algebra of dimension $\leq…

Differential Geometry · Mathematics 2019-02-18 Diego Conti , Federico A. Rossi

The main purpose of this paper is to study the finite-dimensional solvable Lie algebras described in its title, which we call {\em minimal non-${\mathcal N}$}. To facilitate this we investigate solvable Lie algebras of nilpotent length $k$,…

Rings and Algebras · Mathematics 2016-08-25 David A. Towers

In this paper, we define partially capable Lie superalgebra. As an application we classify all capable nilpotent Lie superalgebras of dimension less than equal to five.

Rings and Algebras · Mathematics 2023-08-22 Rudra Narayan Padhan , Ibrahem Yakzan Hasan , Saudamini Nayak

We compute all complex structures on indecomposable 6-dimensional real Lie algebras and their equivalence classes. We also give for each of them a global holomorphic chart on the connected simply connected Lie group associated to the real…

Rings and Algebras · Mathematics 2008-09-05 L. Magnin

The paper is devoted to give a full classification of all finite dimensional nilpotent Lie algebras $ L $ of class $4$ such that $ \dim L^2=3. $ Moreover, we classify the capable ones.

Rings and Algebras · Mathematics 2021-05-21 Faangis Johari , Peyman Niroomand , Mohsen Parvizi

A study is made of real Lie algebras admitting a hypersymplectic structure, and we provide a method to construct such hypersymplectic Lie algebras. We use this method in order to obtain the classification of all hypersymplectic structures…

Differential Geometry · Mathematics 2007-05-23 Adrian Andrada

We classify nilpotent Lie algebras with complex structures of weakly non-nilpotent type in real dimension eight, which is the lowest dimension where they arise. Our study, together with previous results on strongly non-nilpotent structures,…

Differential Geometry · Mathematics 2025-02-10 A. Latorre , L. Ugarte

We investigate symplectic nilpotent Lie groups with Lagrangian normal subgroups. We show that there exists a bijection between the isomorphism classes of nilpotent Lie groups with Lagrangian normal subgroups and the isomorphism classes of…

Symplectic Geometry · Mathematics 2026-01-27 T. Aït Aissa , M. W. Mansouri