self-adjoint subgroup
21Cartan subalgebra — In mathematics, a Cartan subalgebra is a nilpotent subalgebra mathfrak{h} of a Lie algebra mathfrak{g} that is self normalising (if [X,Y] in mathfrak{h} for all X in mathfrak{h}, then Y in mathfrak{h}).Cartan subalgebras exist for finite… …
22E₇ — In mathematics, E7 is the name of several Lie groups and also their Lie algebras mathfrak{e} 7. It is one of the five exceptional compact simple Lie groups as well as one of the simply laced groups. E 7 has rank 7 and dimension 133. The… …
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