books.google.com - Mathematical gauge theory studies connections on principal bundles, or, more precisely, the solution spaces of certain partial differential equations for such connections. Historically, these equations have come from mathematical physics, and play an important role in the description of the electro-weak...http://books.google.com/books/about/Floer_Homology_Gauge_Theory_and_Low_dime.html?id=wUWHqT5dWJ8C&utm_source=gb-gplus-shareFloer Homology, Gauge Theory, and Low-dimensional Topology