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Silvestrov, Sergei, ProfessorORCID iD iconorcid.org/0000-0003-4554-6528
Alternative names
Publications (10 of 283) Show all publications
Mabrouk, S., Ncib, O., Sendi, S. & Silvestrov, S. (2026). Pseudo-Euclidean Hom-alternative superalgebras and Hom-post-alternative superalgebras. Communications in Algebra, 54(1), 347-364
Open this publication in new window or tab >>Pseudo-Euclidean Hom-alternative superalgebras and Hom-post-alternative superalgebras
2026 (English)In: Communications in Algebra, ISSN 0092-7872, E-ISSN 1532-4125, Vol. 54, no 1, p. 347-364Article in journal (Refereed) Published
Abstract [en]

The purpose of this paper is to study pseudo-Euclidean and symplectic Hom-alternative superalgebras and discuss some of their proprieties and provide construction procedures. We also introduce the notion of Rota-Baxter operators of pseudo-Euclidean Hom-alternative superalgebras of any weight and Hom-post-alternative superalgebras. A Hom-post-alternative superalgebra consists of three operations such that some compatibility conditions are satisfied. We show that a weighted Rota-Baxter operator induces a Hom-post-alternative superalgebra naturally. Conversely, a Hom-post-alternative superalgebra gives rise to a new Hom-alternative superalgebra. In particular, a Hom-pre-alternative superalgebra is naturally built via symplectic structures.

Place, publisher, year, edition, pages
Informa UK Limited, 2026
Keywords
Hom-alternative superalgebra, Hom-post-alternative superalgebra, pseudo-Euclidean, Rota-Baxter operator, symplectic
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-72890 (URN)10.1080/00927872.2025.2525387 (DOI)001529792100001 ()2-s2.0-105010928443 (Scopus ID)
Available from: 2025-07-29 Created: 2025-07-29 Last updated: 2025-11-19Bibliographically approved
Aikous, A., Chebel, Z., Bouremel, H. & Silvestrov, S. (2026). Rota-Baxter operators on Hom-groups and the isomorphism theorems. Communications in Algebra
Open this publication in new window or tab >>Rota-Baxter operators on Hom-groups and the isomorphism theorems
2026 (English)In: Communications in Algebra, ISSN 0092-7872, E-ISSN 1532-4125Article in journal (Refereed) Epub ahead of print
Abstract [en]

We extend the concept of Rota-Baxter operator from algebras and groups to the setting of Hom-groups. The concept of Rota-Baxter Hom-group is introduced, and fundamental properties are described. Constructions of Rota-Baxter operators for Hom-groups are obtained. We obtain Rota-Baxter Hom-subgroups, quotient Rota-Baxter Hom-groups, and demonstrate the first, second, and third isomorphism theorems of Rota-Baxter Hom-groups. A theorem on extension of the Rota-Baxter operator of a Hom-group G to the Rota-Baxter operator of a Hom-group algebra over a field K, and the conditions of existence of a homomorphism from the Hom-algebra KG into itself, through a Rota-Baxter operator of Hom-group, are obtained.

Place, publisher, year, edition, pages
Informa UK Limited, 2026
Keywords
Hom-group, isomorphism of Rota-Baxter Hom-groups, quotient Rota-Baxter Hom-group, Rota-Baxter Hom-group, Rota-Baxter Hom-subgroup
National Category
Algebra and Logic
Identifiers
urn:nbn:se:mdh:diva-75395 (URN)10.1080/00927872.2025.2602883 (DOI)001654214800001 ()2-s2.0-105026701849 (Scopus ID)
Available from: 2026-01-14 Created: 2026-01-14 Last updated: 2026-01-14Bibliographically approved
Laraiedh, I. & Silvestrov, S. (2025). Averaging operators on q-deformed Witt and q-deformed W(2, 2) algebras. Communications in Algebra, 53(8), 3437-3465
Open this publication in new window or tab >>Averaging operators on q-deformed Witt and q-deformed W(2, 2) algebras
2025 (English)In: Communications in Algebra, ISSN 0092-7872, E-ISSN 1532-4125, Vol. 53, no 8, p. 3437-3465Article in journal (Refereed) Published
Abstract [en]

The aim of this paper is to give some constructions results of averaging operators on Hom-Lie algebras. The homogeneous averaging operators on q-deformed Witt and q-deformed W(2, 2) Hom-algebras are classified. As applications, the induced Hom-Leibniz algebra structures are obtained and their multiplicativity conditions are also given. 

Place, publisher, year, edition, pages
Informa UK Limited, 2025
Keywords
Averaging operator, Hom-Lie algebra, q-deformed W(2, 2) Hom-algebra, q-deformed Witt Hom-algebra
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-70465 (URN)10.1080/00927872.2025.2460101 (DOI)001468011500001 ()2-s2.0-86000240735 (Scopus ID)
Available from: 2025-03-19 Created: 2025-03-19 Last updated: 2025-10-10Bibliographically approved
Basdouri, I., Benabdelhafidh, S., Saghrouni, A. & Silvestrov, S. (2025). Cohomology and deformations of crossed homomorphisms on Lie conformal algebras. Advanced Studies: Euro-Tbilisi Mathematical Journal, 18(3), 91-107
Open this publication in new window or tab >>Cohomology and deformations of crossed homomorphisms on Lie conformal algebras
2025 (English)In: Advanced Studies: Euro-Tbilisi Mathematical Journal, ISSN 2667-9930, Vol. 18, no 3, p. 91-107Article in journal (Refereed) Published
Abstract [en]

In this paper, first we introduce the notion of crossed homomorphisms on Lie conformal algebras, then we construct a differential graded Lie algebra whose Maurer-Cartan elements are given by crossed homomorphisms on Lie conformal algebras. This permits us to define cohomology for crossed homomorphisms. As an application, we study infinitesimal deformations, formal deformations and extendibility of finite order deformations of crossed homomorphism between Lie conformal algebras in terms of the cohomology theory.

Place, publisher, year, edition, pages
Tbilisi Centre for Mathematical Sciences, 2025
Keywords
Lie conformal algebra, crossed homomorphism, Maurer-Cartan elements, cohomology, deformations
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-73755 (URN)10.32513/asetmj/193220082518306 (DOI)001628223900006 ()
Available from: 2025-10-16 Created: 2025-10-16 Last updated: 2025-12-16Bibliographically approved
Nazir, T., Ali, Z., Jogan, S. N. & Silvestrov, S. (2025). Fixed point results for set-contractions on semi-metric space with a directed graph. Applied General Topology, 26(2), 617-631
Open this publication in new window or tab >>Fixed point results for set-contractions on semi-metric space with a directed graph
2025 (English)In: Applied General Topology, ISSN 1576-9402, Vol. 26, no 2, p. 617-631Article in journal (Refereed) Published
Abstract [en]

In this paper, fixed point results with respect to generalized rational contractive mappings in semi-metric spaces endowed with a directed graph are proved. Some examples are provided to illustrate the results. The obtained results extend, improve and generalize many results in the existing literature.

Place, publisher, year, edition, pages
Universitat Politecnica de Valencia, 2025
Keywords
fixed point, semi-metric space, gengeralized graph contractionn, multi-valued mapping, directed graph
National Category
Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-73836 (URN)10.4995/agt.2025.21706 (DOI)001594520300003 ()2-s2.0-105018515036 (Scopus ID)
Available from: 2025-10-27 Created: 2025-10-27 Last updated: 2025-11-03Bibliographically approved
Mboya, S., Silvestrov, S., Kitouni, A., Ongong’a, E. & Ongaro, J. (2025). Hom-Lie structures of Generalized sl(2)-Type. In: Mitrović, Melanija; Hounkonnou, Mahouton Norbert (Ed.), Algebra Without Borders: Classical and Constructive Semigroups and Applications (pp. 403-450). Springer
Open this publication in new window or tab >>Hom-Lie structures of Generalized sl(2)-Type
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2025 (English)In: Algebra Without Borders: Classical and Constructive Semigroups and Applications / [ed] Mitrović, Melanija; Hounkonnou, Mahouton Norbert, Springer, 2025, p. 403-450Chapter in book (Refereed)
Abstract [en]

This work focuses on the properties and structures of Hom-Lie algebras of generalized sl(2)-type. We construct classes of linear twisting maps that turn a skew-symmetric algebra of generalized sl(2)-type into a Hom-Lie algebra, and identify subclasses that result in multiplicative Hom-Lie algebras. We explore ideals, Hom-ideals, subalgebras, and Hom-subalgebras, emphasizing derived series, central descending series, and nilpotence and solvability properties. We also investigate the invariance of these subalgebras under the linear twisting maps and determine whether these subalgebras are weak subalgebras, Hom-subalgebras, weak ideals, or Hom-ideals. In particular, we examine these subalgebras and properties for the subfamilies of non-multiplicative Hom-Lie algebras of generalized sl(2)-type, highlighting the differences between non-multiplicative and multiplicative cases.

Place, publisher, year, edition, pages
Springer, 2025
Series
Mathematics in Mind, ISSN 2522-5405, E-ISSN 2522-5413
Keywords
Hom-Lie algebra, Weak ideal, Hom-ideal, Central descending series, Derived series, Solvable Hom-algebra, Nilpotent Hom-algebras
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-73724 (URN)10.1007/978-3-031-86477-3_11 (DOI)978-3-031-86476-6 (ISBN)978-3-031-86477-3 (ISBN)
Available from: 2025-10-14 Created: 2025-10-14 Last updated: 2025-10-28Bibliographically approved
Agrebaoui, B., Basdouri, K., Benabdelhafidh, S. & Silvestrov, S. (2025). Morphisms deformations and abelian extensions of differential Lie algebras. Advanced Studies: Euro-Tbilisi Mathematical Journal, 18(3), 121-137
Open this publication in new window or tab >>Morphisms deformations and abelian extensions of differential Lie algebras
2025 (English)In: Advanced Studies: Euro-Tbilisi Mathematical Journal, ISSN 2667-9930, Vol. 18, no 3, p. 121-137Article in journal (Refereed) Published
Abstract [en]

The purpose of the present paper is to investigate cohomology of differential Lie algebra morphisms. First, we discuss representations of differential Lie algebra morphisms. Moreover, we construct cohomology of differential Lie algebra morphisms. As applications of our cohomology, we study formal deformations and abelian extensions of differential Lie algebra morphisms.

Place, publisher, year, edition, pages
Tbilisi Centre for Mathematical Sciences, 2025
Keywords
Lie conformal algebra, crossed homomorphism, Maurer-Cartan elements, cohomology, deformations
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-73756 (URN)10.32513/asetmj/193220082518308 (DOI)001628223900008 ()
Available from: 2025-10-16 Created: 2025-10-16 Last updated: 2025-12-16Bibliographically approved
García Butenegro, G. & Silvestrov, S. (2025). Set-theoretical considerations and zero-division on hom-associative algebras. In: Melanija Mitrović, Mahouton Norbert Hounkonnou (Ed.), Algebra Without Borders: Classical and Constructive Semigroups and Applications (pp. 371-402). Springer
Open this publication in new window or tab >>Set-theoretical considerations and zero-division on hom-associative algebras
2025 (English)In: Algebra Without Borders: Classical and Constructive Semigroups and Applications / [ed] Melanija Mitrović, Mahouton Norbert Hounkonnou, Springer, 2025, p. 371-402Chapter in book (Refereed)
Abstract [en]

The purpose of this article is to examine zero-division relations between elements and ideals of general algebras using set-theoretical tools. By splitting an algebra into subsets according to zero-division relations, it is possible to establish certain zero-division rules on linear combinations and thus arbitrary elements of a given algebra. We investigate in detail these subsets, properties of zero-division relation, subsets of zero-divisors and annihilators in hom-algebras and in particular hom-associative algebras. For hom-associative algebras, we investigate properties of zero division relation subsets of the kernel of the twisting map, annihilators. Furthermore, we investigate kernels of right and left multiplication operators, ideals, hom-ideals, simplicity, hom-simplicity and domain properties for general hom-algebras and Hom-associative algebras and low-dimensional hom-associative algebras of non-associative type using the kernels of twisting maps, annihilators and their zero-division relation subsets. 

Place, publisher, year, edition, pages
Springer, 2025
Series
Mathematics in Mind, ISSN 2522-5405, E-ISSN 2522-5413
Keywords
Hom-algebra, Zero divisor, Hom-ideal, Hom-subalgebra
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-73229 (URN)10.1007/978-3-031-86477-3_10 (DOI)978-3-031-86476-6 (ISBN)978-3-031-86477-3 (ISBN)
Available from: 2025-09-10 Created: 2025-09-10 Last updated: 2025-10-28Bibliographically approved
Mabrouk, S., Silvestrov, S. & Zouaidi, F. (2025). Twisting O-operators by (2,3)-cocycle of Hom-Lie-Yamaguti algebras with representations. Journal of Geometry and Physics, 216, Article ID 105546.
Open this publication in new window or tab >>Twisting O-operators by (2,3)-cocycle of Hom-Lie-Yamaguti algebras with representations
2025 (English)In: Journal of Geometry and Physics, ISSN 0393-0440, E-ISSN 1879-1662, Vol. 216, article id 105546Article in journal (Refereed) Published
Abstract [en]

In this paper, we first introduce the notion of twisted O-operators on a Hom-Lie-Yamaguti algebra by a given (2, 3)-cocycle with coefficients in a representation. We show that a twisted O-operator induces a Hom-Lie-Yamaguti structure. We also introduce the notion of a weighted Reynolds operator on a Hom-Lie-Yamaguti algebra, which can serve as a special case of twisted O-operators on Hom-Lie-Yamaguti algebras. Then, we define a cohomology of twisted O-operator on Hom-Lie-Yamaguiti algebras with coefficients in a representation. Furthermore, we introduce and study the Hom-NS-Lie-Yamaguti algebras as the underlying structure of the twisted O-operator on Hom-Lie-Yamaguti algebras. Finally, we investigate the twisted O-operator on Hom-Lie-Yamaguti algebras induced by the twisted O-operator on Hom-Lie algebras.

Place, publisher, year, edition, pages
Elsevier BV, 2025
Keywords
Hom-Lie algebra, Hom-Lie-Yamaguti algebra, Representation, Twisted O-operator, Reynolds operator, Cohomology
National Category
Algebra and Logic
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-72162 (URN)10.1016/j.geomphys.2025.105546 (DOI)001506636400001 ()2-s2.0-105007323050 (Scopus ID)
Available from: 2025-06-18 Created: 2025-06-18 Last updated: 2025-12-17Bibliographically approved
Nazir, T. & Silvestrov, S. (2024). Common Attractors for Generalized F-Iterated Function Systems in G-Metric Spaces. Fractal and Fractional, 8(6), Article ID 346.
Open this publication in new window or tab >>Common Attractors for Generalized F-Iterated Function Systems in G-Metric Spaces
2024 (English)In: Fractal and Fractional, ISSN 2504-3110, Vol. 8, no 6, article id 346Article in journal (Refereed) Published
Abstract [en]

In this paper, we study the generalized F-iterated function system in G-metric space. Several results of common attractors of generalized iterated function systems obtained by using generalized F-Hutchinson operators are also established. We prove that the triplet of F-Hutchinson operators defined for a finite number of general contractive mappings on a complete G-metric space is itself a generalized F-contraction mapping on a space of compact sets. We also present several examples in 2-D and 3-D for our results.

Place, publisher, year, edition, pages
MDPI, 2024
Keywords
common attractor, common fixed point, F-Hutchinson operator, F-iterated function system, G-metric space
National Category
Mathematical Analysis
Research subject
Mathematics/Applied Mathematics
Identifiers
urn:nbn:se:mdh:diva-68002 (URN)10.3390/fractalfract8060346 (DOI)001257479300001 ()2-s2.0-85196875977 (Scopus ID)
Available from: 2024-07-03 Created: 2024-07-03 Last updated: 2025-10-10Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4554-6528