An invariant of null spinor fields

Bogdan Niţǎ, Ivor Robinson

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number309
Pages (from-to)2149-2152
Number of pages4
JournalClassical and Quantum Gravity
Issue number10
StatePublished - 21 May 2000


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