Hermitian-Einstein connections on principal bundles over flat affine manifolds

Details Hermitian-Einstein connections on principal bundles over flat affine manifolds Hermitian-Einstein connections on principal bundles over flat affine manifolds

2011-09-27

arxiv.org/abs/1109.5808v1

Mathematics

Differential Geometry

Final version; to appear in International Journal of Mathematics

Scientific paper

Let $M$ be a compact connected special flat affine manifold without boundary equipped with a Gauduchon metric $g$ and a covariant constant volume form. Let $G$ be either a connected reductive complex linear algebraic group or the real locus of a split real form of a complex reductive group. We prove that a flat principal $G$-bundle $E_G$ over $M$ admits a Hermitian-Einstein structure if and only if $E_G$ is polystable. A polystable flat principal $G$--bundle over $M$ admits a unique Hermitian-Einstein connection. We also prove the existence and uniqueness of a Harder-Narasimhan filtration for flat vector bundles over $M$.

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