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On special subalgebras of derivations of Lie algebras. (English) Zbl 1376.17027

Summary: Let \(L\) be a Lie algebra, and \(\mathrm{Der}(L) \) and \(\mathrm{IDer}(L)\) be the set of all derivations and inner derivations of \(L\), respectively. Also, let \(\mathrm{Der}_{c}(L)\) denote the set of all derivations \(\alpha \in \mathrm{Der}(L)\) for which \(\alpha(x) \in \mathrm{Imad}_{x}\) for all \(x \in L\). We give necessary and sufficient conditions under which \(\mathrm{Der}_{c}(L) = \mathrm{Der}_{z}(L), \) where \(\mathrm{Der}_{z}(L) \) is the set of all derivations of \(L\) whose images lie in the center of \(L\). Moreover, it is shown that any two isoclinic Lie algebras \(L_{1}\) and \(L_{2}\) satisfy \(\mathrm{Der}_{c}(L_{1}) \cong \mathrm{Der}_{c}(L_{2})\).

MSC:

17B40 Automorphisms, derivations, other operators for Lie algebras and super algebras
17B30 Solvable, nilpotent (super)algebras
Full Text: DOI

References:

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