Hyphs and the Ashtekar-Lewandowski measure
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Submission date: 27. Jan. 2000
published in: Journal of geometry and physics, 45 (2003) 3-4, p. 231-251
DOI number (of the published article): 10.1016/S0393-0440(00)00036-X
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Properties of the space of generalized connections in the Ashtekar framework are investigated.
First a construction method for new connections is given. The new parallel transports differ from the original ones only along paths that pass an initial segment of a fixed path. This is closely related to a new notion of path independence. Although we do not restrict ourselves to the immersive smooth or analytical case, any finite set of paths depends on a finite set of independent paths, a so-called hyph. This generalizes the well-known directedness of the set of smooth webs and that of analytical graphs, respectively.
Due to these propositions, on the one hand, the projections from to the lattice gauge theory are surjective and open. On the other hand, an induced Haar measure can be defined for every compact structure group irrespective of the used smoothness category for the paths.