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gr-qc2021★ 3 cited
Doubly Torqued Vectors and a classification of Doubly Twisted and Kundt spacetimes
Carlo Alberto Mantica, Luca Guido Molinari
The simple structure of doubly torqued vectors allows for a natural characterization of doubly twisted down to warped spacetimes, as well as Kundt spacetimes down to PP waves. For…
gr-qc2021★ 5 cited
A simple characterization of doubly twisted spacetimes
Carlo Alberto Mantica, Luca Guido Molinari
In this note we characterize 1+n doubly twisted spacetimes in terms of `doubly torqued' vector fields. They extend Bang-Yen Chen's characterization of twisted and generalized Rober…