activity
20232026
collaborators

6 papers

math.RA2026

Derivation Algebras of Three-Dimensional Leibniz Algebras: A Complete Description

Leonid A. Kurdachenko, Oleksandr O. Pypka, Mykola M. Semko

Derivation algebras are natural structural invariants of Leibniz algebras. In a number of earlier papers, derivations were described for several classes of one-generated, nilpotent…

math.RA2026

Automorphism Groups of Three-Dimensional Leibniz Algebras: A Complete Description

Leonid A. Kurdachenko, Oleksandr O. Pypka, Mykola M. Semko

Automorphism groups are among the most natural structural invariants of an algebra, and their explicit determination is a basic problem in the structure theory of Leibniz algebras.…

math.RA2025

Leibniz rings: some basic and structural results

L. A. Kurdachenko, O. O. Pypka, M. M. Semko

In this paper, we study the fundamental properties of Leibniz rings. Special attention is given to the structure of Leibniz rings whose additive group is "small". The results obtai…

math.RA2023

On the automorphism groups of some nilpotent 3-dimensional Leibniz algebras

L. A. Kurdachenko, O. O. Pypka, M. M. Semko

Let be an algebra over a field with the binary operations and . Then is called a left Leibniz algebra if it satisfies the left Leibniz identity: $[[a,b],c]=[a,…

math.RA2023

On the algebra of derivations of some low-dimensional Leibniz algebras

L. A. Kurdachenko, M. M. Semko, I. Ya. Subbotin

We study the algebras of derivations of nilpotent Leibniz algebras of low dimensions.

math.RA2023

Automorphism groups of some 3-dimensional Leibniz algebras

L. A. Kurdachenko, O. O. Pypka, M. M. Semko

Let be an algebra over a field with the binary operations and . Then is called a left Leibniz algebra if it satisfies the left Leibniz identity: $[[a,b],c]=[a,…