Tetrads of Observers and Einstein's Equations

摘要

In the paper it is shown that the tetrad formalism can be used to deduce the Lagrangian responsible for the effects of gravitation. The fields of a tetrad specified by a certain type of observers can be considered as physical fields and then these fields can be rendered to follow the variational principle. A Lagrangian can be built up along the classical routes, and the Euler-Lagrange equations turn out to be Einstein's equations. It is essential that local Lorentz covariance is used in this deduction. (Atomindex citation 11:518883)