Electromagnetic and gravitational Hertz potentials

Abstract
With generality of complex relativity, the classical theory of the electromagnetic Hertz potentials is outlined in terms of spinors and forms. Particularly interesting are D (0,1) and D (1,0) null Hertz potentials. Then, a new spinorial approach to heavens (H spaces) is proposed, which reveals in their structure the presence of the left null gravitational Hertz potential [of the type D (0,2)]. The relevant hints which follow from our results and concern the structure of the most general solutions of the Einstein vacuum equations (type GG), are discussed, in particular on the level of the linearized theory.

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