Lorentz Invariance and the Gravitational Field

2 C. N. Yang and R. L. Mills, Phys. Rev. 96, i91 (1954). 3 Ryoyu Utiyama, Phys. Rev. 101, 1597 (1956). scalar density expressed in terms of hk' and A iiI" This Lagrangian is of first order in the derivatives, and is the analog for the vierbein formalism of Palatini's Lagrangian. In the absence of matter, it ................
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