On theta pair for a proper subalgebra

Authors: ALI REZA SALEMKAR, Sara Chehrazi, HAMID MOHAMMADZADEH

Abstract: For a proper subalgebra K of a finite dimensional Lie algebra L, a pair (A,B) of subalgebras of L is called a \theta-pair if L = \langle A,K\rangle, B is the largest ideal of L contained in A\cap K and for each proper subalgebra C/B of A/B which is an ideal of L/B, we have L\neq C+K. In this article, using this concept, we give some characterizations of solvability and supersolvability of a finite dimensional Lie algebra.

Keywords: \theta-pair, Lie algebra, solvable, supersolvable

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