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Regular connections among generalized connections. (English) Zbl 1029.81069

Summary: The properties of the space \(\mathcal A\) of regular connections as a subset of the space \(\overline{\mathcal A}\) of generalized connections in the Ashtekar framework are studied. For every choice of compact structure group and smoothness category for the paths, it is determined whether \(\mathcal A\) is dense in \(\overline{\mathcal A}\) or not. Moreover, it is proven that \(\mathcal A\) has Ashtekar-Lewandowski measure zero for every non-trivial structure group and every smoothness category. The analogous results hold for gauge orbits instead of connections.

MSC:

81V17 Gravitational interaction in quantum theory
83C45 Quantization of the gravitational field
81T13 Yang-Mills and other gauge theories in quantum field theory
53C05 Connections (general theory)

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