Mathematics – Differential Geometry
Scientific paper
1999-04-13
Mathematics
Differential Geometry
In this new version, there are no structural changes from the previous. Some mistakes in the tables of Theorem 1.4, of Theorem
Scientific paper
An explicit classification of simply connected compact homogeneous CR manifolds G/L of codimension one, with non-degenerate Levi form, is given. There are three classes of such manifolds: a) the standard CR homogeneous manifolds which are homogeneous S^1-bundles over a flag manifold F, with CR structure induced by an invariant complex structure on F; b) the Morimoto-Nagano spaces, i.e. sphere bundles $S(N)\subset TN$ of a compact rank one symmetric space N = G/H, with the CR structure induced by the natural complex structure of $TN = G^\C/H^\C$; c) the following manifolds: $SU_n/T^1\cdot SU_{n-2}$, $SU_p\times SU_q/T^1 \cdot U_{p-2}\cdot U_{q-2}$, $SU_n/T^1\cdot SU_2\cdot SU_2\cdot SU_{n-4}$, $SO_{10}/T^1\cdot SO_6$, $E_6/T^1\cdot SO_8$; these manifolds admit canonical holomorphic fibrations over a flag manifold (F,J_F) with typical fiber S(S^k), where k = 2, 3, 5, 7 or 9, respectively; the CR structure is determined by the invariant complex structure J_F on F and by an invariant CR structure on the typical fiber, depending on one complex parameter.
Alekseevsky Dmitry V.
Spiro Andrea F.
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