English

Logarithmic Cartan geometry on complex manifolds with trivial logarithmic tangent bundle

Complex Variables 2024-11-14 v1 Algebraic Geometry Differential Geometry

Abstract

Let MM be a compact complex manifold, and DMD\, \subset\, M a reduced normal crossing divisor on it, such that the logarithmic tangent bundle TM(logD)TM(-\log D) is holomorphically trivial. Let A{\mathbb A} denote the maximal connected subgroup of the group of all holomorphic automorphisms of MM that preserve the divisor DD. Take a holomorphic Cartan geometry (EH,Θ)(E_H,\,\Theta) of type (G,H)(G,\, H) on MM, where HGH\, \subset\, G are complex Lie groups. We prove that (EH,Θ)(E_H,\,\Theta) is isomorphic to (ρEH,ρΘ)(\rho^* E_H,\,\rho^* \Theta) for every ρA\rho\, \in\, \mathbb A if and only if the principal HH--bundle EHE_H admits a logarithmic connection Δ\Delta singular on DD such that Θ\Theta is preserved by the connection Δ\Delta.

Keywords

Cite

@article{arxiv.2411.08593,
  title  = {Logarithmic Cartan geometry on complex manifolds with trivial logarithmic tangent bundle},
  author = {Indranil Biswas and Sorin Dumitrescu and Archana S. Morye},
  journal= {arXiv preprint arXiv:2411.08593},
  year   = {2024}
}

Comments

Final version to appear in Journal of Differential Geometry and its Applications