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gr-qc2013
Different representations of the Levi-Civita Bertotti Robinson solution
Oyvind Gron, Steinar Johannesen
The Levi-Civita Bertotti Robinson (LBR) spacetime is investigated in various coordinate systems. By means of a general formalism for constructing coordinates in conformally flat sp…
gr-qc2007★ 15 cited
Closed timelike geodesics in a gas of cosmic strings
Oyvind Gron, Steinar Johannesen
We find a class of solutions of Einstein's field equations representing spacetime outside a spinning cosmic string surrounded by a gas of non-spinning cosmic strings, and show that…