Field equations and conservation laws in the nonsymmetric gravitational theory

The field equations in the nonsymmetric gravitational theory are derived from a Lagrangian density using a first-order formalism. Using the general covariance of the Lagrangian density, conservation laws and tensor identities are derived. Among these are the generalized Bianchi identities and the law of energy-momentum conservation. The Lagrangian density is expanded to second-order, and treated as an Einstein plus fields theory. From this, it is deduced that the energy is positive in the radiation zone.