The Parameter Space of Orbits of a Maximal Compact Subgroup Acting on a Flag Manifold

B. Ntatin

Journal of Mathematics, 2019, vol. 2019, 1-9

Abstract:

The orbits of a real form of a complex semisimple Lie group and those of the complexification of its maximal compact subgroup acting on , a homogeneous, algebraic, - manifold, are finite. Consequently, there is an open - orbit. Lower-dimensional orbits are on the boundary of the open orbit with the lowest dimensional one being closed. Induced action on the parameter space of certain compact geometric objects (cycles) related to the manifold in question has been characterized using duality relations between - and - orbits in the case of an open - orbit and more recently lower-dimensional - orbits. We show that the parameter space associated with the unique closed - orbit in agrees with that of the other orbits characterized as a certain explicitly defined universal domain.

Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jjmath:9105474

DOI: 10.1155/2019/9105474

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