PSL(2;C) connections on 3-manifolds with L2 bounds on curvature
  Karen Uhlenbeck's compactness theorem for sequences of connections with L2 bounds on curvature applies only to connections on principal bundles with compact structure group. This article states and proves an extension of Uhlenbecks theorem that describes sequences of connections on principal PSL(2;C) bundles over compact three dimensional manifolds. 
Clifford Henry Taubes
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