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Maximal subalgebras of Cartan type in the exceptional Lie algebras (1409.3861v2)
Published 12 Sep 2014 in math.RA, math.GR, and math.RT
Abstract: In this paper we initiate the study of the maximal subalgebras of exceptional simple classical Lie algebras \g over algebraically closed fields k of positive characteristic p, such that the prime characteristic is good for \g. In this paper we deal with what is surely the most unnatural case; that is, where the maximal subalgebra in question is a simple subalgebra of non-classical type. We show that only the first Witt algebra can occur as a subalgebra of \g and give explicit details on when it may be maximal in \g.