Isoclinic extensions of Lie algebras

Authors: HAMID MOHAMMADZADEH, ALI REZA SALEMKAR, ZAHRA RIYAHI

Abstract: In this article we introduce the notion of the equivalence relation, isoclinism, on the central extensions of Lie algebras, and determine all central extensions occurring in an isoclinism class of a given central extension. We also show that under some conditions, the concepts of isoclinism and isomorphism between the central extensions of finite dimensional Lie algebras are identical. Finally, the connection between isoclinic extensions and the Schur multiplier of Lie algebras are discussed.

Keywords: Lie algebra, isoclinic extensions, Schur multiplier, stem cover

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