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Finite orbit decomposition of real flag manifolds (1307.2375v2)
Published 9 Jul 2013 in math.RT
Abstract: Let G be a connected real semi-simple Lie group and H a closed connected subgroup. Let P be a minimal parabolic subgroup of G. It is shown that H has an open orbit on the flag manifold G/P if and only if it has finitely many orbits on G/P. This confirms a conjecture by T. Matsuki.
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