How do I prove that gauge-equivalence classes of $U(1)$ connections on a line bundle $L\to M$ are determined uniquely by pairs $(\alpha,F)$, where $$\alpha\in\text{Hom}(\pi_1(M),U(1)),~~~~F\in \Omega^2(M)?$$
Is a non-flat hermitian connection determined uniquely by its holonomy and curvature?
David Roberts
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