Transversely holomorphic branched Cartan geometry
arXiv:1803.06472 · doi:10.1016/j.geomphys.2018.08.005
Abstract
Earlier we introduced and studied the concept of holomorphic {\it branched Cartan geometry}. We define here a foliated version of this notion; this is done in terms of Atiyah bundle. We show that any complex compact manifold of algebraic dimension admits, away from a closed analytic subset of positive codimension, a nonsingular holomorphic foliation of complex codimension endowed with a transversely flat branched complex projective geometry (equivalently, a -geometry). We also prove that transversely branched holomorphic Cartan geometries on compact complex projective rationally connected varieties and on compact simply connected Calabi-Yau manifolds are always flat (consequently, they are defined by holomorphic maps into homogeneous spaces).