Variational principles and gauge theories of gravitation

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, , Citation G Stephenson 1977 J. Phys. A: Math. Gen. 10 181 DOI 10.1088/0305-4470/10/2/006

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1 Dept. of Math., Imperial Coll., London, UK

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Abstract

Attention is drawn to difficulties associated with gravitational theories based on Lagrangians formed from quadratic invariants of the Riemann tensor, and in particular with the Palatini variational method used by Yang in a gauge theory of gravitation. It is pointed out that the Yang theory is not mathematically well founded.

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