Title

An Invariant of Null Spinor Fields

Document Type

Article

Publication Date

5-21-2000

Abstract

A differential invariant is found for null fields of arbitrary spin. For null gravitational fields, the invariant is identified as that of Bičác and Pravda; its derivation from the Bel-Robinson tensor is given; and a simple expression is found for its value in null perturbations of flat spacetimes.

DOI

10.1088/0264-9381/17/10/309

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