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We give algebraic and geometric classifications of complex $4$-dimensional nilpotent noncommutative Jordan algebras. Specifically, we find that, up to isomorphism, there are only $18$ non-isomorphic nontrivial nilpotent noncommutative…

Rings and Algebras · Mathematics 2020-07-03 Doston Jumaniyozov , Ivan Kaygorodov , Abror Khudoyberdiyev

The paper is devoted to classify nilpotent Jordan algebras of dimension up to five over an algebraically closed field of characteristic not 2. We obtained a list of 35 isolated non-isomorphic 5-dimensional nilpotent non-associative Jordan…

Rings and Algebras · Mathematics 2016-01-21 A. S. Hegazi , Hani Abdelwahab

In this paper we classify the laws of three-dimensional and four-dimensional nilpotent Jordan algebras over the field of complex numbers. We describe the irreducible components of their algebraic varieties and extend contractions and…

Rings and Algebras · Mathematics 2017-02-13 J. M. Ancochea Bermudez , J. Fresan , Juan Margalef-Bentabol

In this paper, we study the variety $Jor_{3}$ of three-dimensional Jordan algebras over the field of real numbers. We establish the list of $26$ non-isomorphic Jordan algebras and describe the irreducible components of $Jor_{3}$ proving…

Rings and Algebras · Mathematics 2014-04-22 Iryna Kashuba , María Eugenia Martin

We describe the variety of Jordan superalgebras of dimension $4$ whose even part is a Jordan algebra of dimension $1$ or $3$. We prove that the variety is the union of Zariski closures of the orbits of $11$ and $21$ rigid superalgebras,…

Rings and Algebras · Mathematics 2025-02-03 Isabel Hernández , María Eugenia Martin , Rodrigo Lucas Rodrigues

We describe the variety of Jordan superalgebras of dimension $4$ whose even part is a Jordan algebra of dimension $2$ over an algebraically closed field $\mathbb{F}$ of characteristic $0$. We prove that the variety has $25$ irreducible…

Rings and Algebras · Mathematics 2025-01-31 Isabel Hernández , María Eugenia Martin , Rodrigo Lucas Rodrigues

We give a geometric classification of complex $5$-dimensional nilpotent commutative $\mathfrak{CD}$-algebras. The corresponding geometric variety has dimension $24$ and decomposes into $10$ irreducible components determined by the Zariski…

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

This paper is devoted to the complete algebraic and geometric classification of complex $4$-dimensional nilpotent left-symmetric algebras. The corresponding geometric variety has dimension $15$ and decomposes into $3$ irreducible components…

Rings and Algebras · Mathematics 2021-06-02 Jobir Adashev , Ivan Kaygorodov , Abror Khudoyberdiyev , Aloberdi Sattarov

We give a geometric classification of complex $4$-dimensional nilpotent $\mathfrak{CD}$-algebras. The corresponding geometric variety has dimension 18 and decomposes into $2$ irreducible components determined by the Zariski closures of a…

Rings and Algebras · Mathematics 2020-07-06 Ivan Kaygorodov , Mykola Khrypchenko

This paper is devoted to the complete algebraic and geometric classification of complex $5$-dimensional nilpotent Leibniz algebras. In particular, the variety of complex $5$-dimensional nilpotent Leibniz algebras has dimension $24$ it has…

Rings and Algebras · Mathematics 2023-07-04 Kobiljon Abdurasulov , Ivan Kaygorodov , Abror Khudoyberdiyev

We give a geometric classification of complex $n$-dimensional $2$-step nilpotent (all, commutative and anticommutative) algebras. Namely, has been found the number of irreducible components and their dimensions. As a corollary, we have a…

Rings and Algebras · Mathematics 2021-11-02 Mikhail Ignatyev , Ivan Kaygorodov , Yury Popov

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

The paper is devoted to the description of the varieties of complex 5-dimensional nilpotent Jordan superalgebras. We find all representatives for the isomorphism classes, using the Jordan normal form, results of simultaneous matrix…

Rings and Algebras · Mathematics 2026-04-17 Isabel Hernández , Laiz Valim da Rocha , Rodrigo Lucas Rodrigues

We give the algebraic and geometric classification of complex four-dimensional Jordan superalgebras. In particular, we describe all irreducible components in the corresponding varieties.

Rings and Algebras · Mathematics 2025-10-09 Kobiljon Abdurasulov , Roman Lubkov , Azamat Saydaliyev

An algebraic classification of complex $5$-dimensional nilpotent commutative $\mathfrak{CD}$-algebras is given. This classification is based on an algebraic classification of complex $5$-dimensional nilpotent Jordan algebras.

Rings and Algebras · Mathematics 2021-09-02 Doston Jumaniyozov , Ivan Kaygorodov , Abror Khudoyberdiyev

We give algebraic and geometric classifications of $6$-dimensional complex nilpotent anticommutative algebras. Specifically, we find that, up to isomorphism, there are $14$ one-parameter families of $6$-dimensional nilpotent anticommutative…

Rings and Algebras · Mathematics 2020-04-03 Ivan Kaygorodov , Mykola Khrypchenko , Samuel A. Lopes

We study finite-dimensional commutative algebras, which satisfy the Jacobi identity. Such algebras are Jordan algebras. We describe some of their properties and give a classification in dimensions $n<7$ over algebraically closed fields of…

Rings and Algebras · Mathematics 2014-07-25 Dietrich Burde , Alice Fialowski

In this paper, we classify four-dimensional Jordan algebras over an algebraically closed field of characteristic different of two. We establish the list of 73 non-isomorphic Jordan algebras.

Rings and Algebras · Mathematics 2016-02-22 María Eugenia Martin

This paper is devoted to the complete algebraic and geometric classification of complex $5$-dimensional Zinbiel algebras. In particular, we proved that the variety of complex $5$-dimensional Zinbiel algebras has dimension $24$, it is…

Rings and Algebras · Mathematics 2022-06-02 María Alejandra Alvarez , Renato Fehlberg Júnior , Ivan Kaygorodov

We describe all degenerations of the variety $\mathfrak{Jord}_3$ of Jordan algebras of dimension three over $\mathbb{C}.$ In particular, we describe all irreducible components in $\mathfrak{Jord}_3.$ For every $n$ we define an…

Rings and Algebras · Mathematics 2021-11-02 Ilya Gorshkov , Ivan Kaygorodov , Yury Popov
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