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Abstract: The minimal coupling procedure, which is employed in standard Yang-Millstheories, appears to be ambiguous in the case of gravity. We propose a slightmodification of this procedure, which removes the ambiguity. Our modificationjustifies some earlier results concerning the consequences of the Poincar\-egauge theory of gravity. In particular, the predictions of the Einstein-Cartantheory with fermionic matter are rendered unique.



Autor: Marcin Kaźmierczak

Fuente: https://arxiv.org/







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