Real groups transitive on complex flag manifolds (Q2719026)

The paper under review deals with subgroups \(A\) of a complex connected semisimple Lie group \(G\) acting transitively on a corresponding complex flag manifold \(Z = G/Q\), where \(Q \subseteq G\) is a parabolic subgroup. It contains a complete list of all such subgroups with special attention to those which are real forms of \(G\). Since the compact real forms always act transitively on \(Z\) for trivial reasons, one only has to consider non-compact proper subgroups.