Klein four-subgroups of Lie algebra automorphisms
Klein four-subgroups of Lie algebra automorphisms
We classify the Klein four-subgroups of Aut(u 0 ) for each compact simple Lie algebra u 0 up to conjugation, by calculating the symmetric subgroups Aut(u 0 ) θ and their involution classes.This leads to a new approach to the classification of semisimple symmetric pairs and ޚ 2 × ޚ …