Deformations of Lie Algebras using σ-Derivations

Jonas Hartwig, Daniel Larsson, Sergei Silvestrov

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Sammanfattning

In this article we develop an approach to deformations of the Witt and Virasoro algebras based on sigma-derivations. We show that sigma-twisted Jacobi type identity holds for generators of such deformations. For the sigma-twisted generalization of Lie algebras modeled by this construction, we develop a theory of central extensions. We show that our approach can be used to construct new deformations of Lie algebras and their central extensions, which in particular include naturally the q-deformations of the Witt and Virasoro algebras associated to q-difference operators, providing also corresponding q-deformed Jacobi identities. (c) 2005 Elsevier Inc. All rights reserved.
Originalspråkengelska
Sidor (från-till)314-361
TidskriftJournal of Algebra
Volym295
Nummer2
DOI
StatusPublished - 2006

Ämnesklassifikation (UKÄ)

  • Matematik

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