I've been studying TQFT and gauge theory. Dijkgraaf-Witten theory in particular. One learns that a topological field theory applied to a manifold outputs the number of principal G bundles of a manifold.(adsbygoogle = window.adsbygoogle || []).push({});

My question is for the Physicists in the room, why do you want to know the number of principal G bundles of a manifold?

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# A Gauge Theory: Principal G Bundles

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